// ***************************************************************** -*- C++ -*-
/*
 * Copyright (C) 2004-2013 Andreas Huggel <ahuggel@gmx.net>
 *
 * This program is part of the Exiv2 distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
 */
/*
  File:      tags.cpp
  Version:   $Rev: 3201 $
  Author(s): Andreas Huggel (ahu) <ahuggel@gmx.net>
             Gilles Caulier (gc) <caulier dot gilles at gmail dot com>
  History:   15-Jan-04, ahu: created
             21-Jan-05, ahu: added MakerNote TagInfo registry and related code
 */
// *****************************************************************************
#include "rcsid_int.hpp"
EXIV2_RCSID("@(#) $Id: tags.cpp 3201 2013-12-01 12:13:42Z ahuggel $")

// *****************************************************************************
// included header files
#include "types.hpp"
#include "tags.hpp"
#include "tags_int.hpp"
#include "error.hpp"
#include "futils.hpp"
#include "value.hpp"
#include "convert.hpp"
#include "i18n.h"                // NLS support.

#include "canonmn_int.hpp"
#include "fujimn_int.hpp"
#include "minoltamn_int.hpp"
#include "nikonmn_int.hpp"
#include "olympusmn_int.hpp"
#include "panasonicmn_int.hpp"
#include "pentaxmn_int.hpp"
#include "samsungmn_int.hpp"
#include "sigmamn_int.hpp"
#include "sonymn_int.hpp"

#include <iostream>
#include <iomanip>
#include <sstream>
#include <utility>
#include <cstdlib>
#include <cassert>
#include <cmath>
#include <cstring>

// *****************************************************************************
// local declarations
namespace {
    // Print version string from an intermediate string
    std::ostream& printVersion(std::ostream& os, const std::string& str);
}

// *****************************************************************************
// class member definitions
namespace Exiv2 {

    using namespace Internal;

    //! List of all known Exif groups. Important: Group name (3rd column) must be unique!
    extern const GroupInfo groupInfo[] = {
        { ifdIdNotSet,     "Unknown IFD", "Unknown", 0 },
        { ifd0Id,          "IFD0",      "Image",        ifdTagList                     },
        { ifd1Id,          "IFD1",      "Thumbnail",    ifdTagList                     },
        { ifd2Id,          "IFD2",      "Image2",       ifdTagList                     },
        { ifd3Id,          "IFD3",      "Image3",       ifdTagList                     },
        { exifId,          "Exif",      "Photo",        exifTagList                    },
        { gpsId,           "GPSInfo",   "GPSInfo",      gpsTagList                     },
        { iopId,           "Iop",       "Iop",          iopTagList                     },
        { subImage1Id,     "SubImage1", "SubImage1",    ifdTagList                     },
        { subImage2Id,     "SubImage2", "SubImage2",    ifdTagList                     },
        { subImage3Id,     "SubImage3", "SubImage3",    ifdTagList                     },
        { subImage4Id,     "SubImage4", "SubImage4",    ifdTagList                     },
        { subImage5Id,     "SubImage5", "SubImage5",    ifdTagList                     },
        { subImage6Id,     "SubImage6", "SubImage6",    ifdTagList                     },
        { subImage7Id,     "SubImage7", "SubImage7",    ifdTagList                     },
        { subImage8Id,     "SubImage8", "SubImage8",    ifdTagList                     },
        { subImage9Id,     "SubImage9", "SubImage9",    ifdTagList                     },
        { subThumb1Id,     "SubThumb1", "SubThumb1",    ifdTagList                     },
        { panaRawId,       "PanaRaw",   "PanasonicRaw", PanasonicMakerNote::tagListRaw },
        { mnId,            "Makernote", "MakerNote",    mnTagList                      },
        { canonId,         "Makernote", "Canon",        CanonMakerNote::tagList        },
        { canonCsId,       "Makernote", "CanonCs",      CanonMakerNote::tagListCs      },
        { canonSiId,       "Makernote", "CanonSi",      CanonMakerNote::tagListSi      },
        { canonCfId,       "Makernote", "CanonCf",      CanonMakerNote::tagListCf      },
        { canonPiId,       "Makernote", "CanonPi",      CanonMakerNote::tagListPi      },
        { canonFiId,       "Makernote", "CanonFi",      CanonMakerNote::tagListFi      },
        { canonPaId,       "Makernote", "CanonPa",      CanonMakerNote::tagListPa      },
        { canonPrId,       "Makernote", "CanonPr",      CanonMakerNote::tagListPr      },
        { fujiId,          "Makernote", "Fujifilm",     FujiMakerNote::tagList         },
        { minoltaId,       "Makernote", "Minolta",      MinoltaMakerNote::tagList      },
        { minoltaCs5DId,   "Makernote", "MinoltaCs5D",  MinoltaMakerNote::tagListCs5D  },
        { minoltaCs7DId,   "Makernote", "MinoltaCs7D",  MinoltaMakerNote::tagListCs7D  },
        { minoltaCsOldId,  "Makernote", "MinoltaCsOld", MinoltaMakerNote::tagListCsStd },
        { minoltaCsNewId,  "Makernote", "MinoltaCsNew", MinoltaMakerNote::tagListCsStd },
        { nikon1Id,        "Makernote", "Nikon1",       Nikon1MakerNote::tagList       },
        { nikon2Id,        "Makernote", "Nikon2",       Nikon2MakerNote::tagList       },
        { nikon3Id,        "Makernote", "Nikon3",       Nikon3MakerNote::tagList       },
        { nikonPvId,       "Makernote", "NikonPreview", ifdTagList                     },
        { nikonVrId,       "Makernote", "NikonVr",      Nikon3MakerNote::tagListVr     },
        { nikonPcId,       "Makernote", "NikonPc",      Nikon3MakerNote::tagListPc     },
        { nikonWtId,       "Makernote", "NikonWt",      Nikon3MakerNote::tagListWt     },
        { nikonIiId,       "Makernote", "NikonIi",      Nikon3MakerNote::tagListIi     },
        { nikonAfId,       "Makernote", "NikonAf",      Nikon3MakerNote::tagListAf     },
        { nikonAf2Id,      "Makernote", "NikonAf2",     Nikon3MakerNote::tagListAf2    },
        { nikonAFTId,      "Makernote", "NikonAFT",     Nikon3MakerNote::tagListAFT    },
        { nikonFiId,       "Makernote", "NikonFi",      Nikon3MakerNote::tagListFi     },
        { nikonMeId,       "Makernote", "NikonMe",      Nikon3MakerNote::tagListMe     },
        { nikonFl1Id,      "Makernote", "NikonFl1",     Nikon3MakerNote::tagListFl1    },
        { nikonFl2Id,      "Makernote", "NikonFl2",     Nikon3MakerNote::tagListFl2    },
        { nikonFl3Id,      "Makernote", "NikonFl3",     Nikon3MakerNote::tagListFl3    },
        { nikonSi1Id,      "Makernote", "NikonSiD80",   Nikon3MakerNote::tagListSi1    },
        { nikonSi2Id,      "Makernote", "NikonSiD40",   Nikon3MakerNote::tagListSi2    },
        { nikonSi3Id,      "Makernote", "NikonSiD300a", Nikon3MakerNote::tagListSi3    },
        { nikonSi4Id,      "Makernote", "NikonSiD300b", Nikon3MakerNote::tagListSi4    },
        { nikonSi5Id,      "Makernote", "NikonSi02xx",  Nikon3MakerNote::tagListSi5    },
        { nikonSi6Id,      "Makernote", "NikonSi01xx",  Nikon3MakerNote::tagListSi5    },
        { nikonCb1Id,      "Makernote", "NikonCb1",     Nikon3MakerNote::tagListCb1    },
        { nikonCb2Id,      "Makernote", "NikonCb2",     Nikon3MakerNote::tagListCb2    },
        { nikonCb2aId,     "Makernote", "NikonCb2a",    Nikon3MakerNote::tagListCb2a   },
        { nikonCb2bId,     "Makernote", "NikonCb2b",    Nikon3MakerNote::tagListCb2b   },
        { nikonCb3Id,      "Makernote", "NikonCb3",     Nikon3MakerNote::tagListCb3    },
        { nikonCb4Id,      "Makernote", "NikonCb4",     Nikon3MakerNote::tagListCb4    },
        { nikonLd1Id,      "Makernote", "NikonLd1",     Nikon3MakerNote::tagListLd1    },
        { nikonLd2Id,      "Makernote", "NikonLd2",     Nikon3MakerNote::tagListLd2    },
        { nikonLd3Id,      "Makernote", "NikonLd3",     Nikon3MakerNote::tagListLd3    },
        { olympusId,       "Makernote", "Olympus",      OlympusMakerNote::tagList      },
        { olympus2Id,      "Makernote", "Olympus2",     OlympusMakerNote::tagList      },
        { olympusCsId,     "Makernote", "OlympusCs",    OlympusMakerNote::tagListCs    },
        { olympusEqId,     "Makernote", "OlympusEq",    OlympusMakerNote::tagListEq    },
        { olympusRdId,     "Makernote", "OlympusRd",    OlympusMakerNote::tagListRd    },
        { olympusRd2Id,    "Makernote", "OlympusRd2",   OlympusMakerNote::tagListRd2   },
        { olympusIpId,     "Makernote", "OlympusIp",    OlympusMakerNote::tagListIp    },
        { olympusFiId,     "Makernote", "OlympusFi",    OlympusMakerNote::tagListFi    },
        { olympusFe1Id,    "Makernote", "OlympusFe1",   OlympusMakerNote::tagListFe    },
        { olympusFe2Id,    "Makernote", "OlympusFe2",   OlympusMakerNote::tagListFe    },
        { olympusFe3Id,    "Makernote", "OlympusFe3",   OlympusMakerNote::tagListFe    },
        { olympusFe4Id,    "Makernote", "OlympusFe4",   OlympusMakerNote::tagListFe    },
        { olympusFe5Id,    "Makernote", "OlympusFe5",   OlympusMakerNote::tagListFe    },
        { olympusFe6Id,    "Makernote", "OlympusFe6",   OlympusMakerNote::tagListFe    },
        { olympusFe7Id,    "Makernote", "OlympusFe7",   OlympusMakerNote::tagListFe    },
        { olympusFe8Id,    "Makernote", "OlympusFe8",   OlympusMakerNote::tagListFe    },
        { olympusFe9Id,    "Makernote", "OlympusFe9",   OlympusMakerNote::tagListFe    },
        { olympusRiId,     "Makernote", "OlympusRi",    OlympusMakerNote::tagListRi    },
        { panasonicId,     "Makernote", "Panasonic",    PanasonicMakerNote::tagList    },
        { pentaxDngId,     "Makernote", "PentaxDng",    PentaxMakerNote::tagList       },
        { pentaxId,        "Makernote", "Pentax",       PentaxMakerNote::tagList       },
        { samsung2Id,      "Makernote", "Samsung2",     Samsung2MakerNote::tagList     },
        { samsungPvId,     "Makernote", "SamsungPreview", ifdTagList                   },
        { samsungPwId,     "Makernote", "SamsungPictureWizard", Samsung2MakerNote::tagListPw },
        { sigmaId,         "Makernote", "Sigma",        SigmaMakerNote::tagList        },
        { sony1Id,         "Makernote", "Sony1",        SonyMakerNote::tagList         },
        { sony2Id,         "Makernote", "Sony2",        SonyMakerNote::tagList         },
        { sonyMltId,       "Makernote", "SonyMinolta",  MinoltaMakerNote::tagList      },
        { sony1CsId,       "Makernote", "Sony1Cs",      SonyMakerNote::tagListCs       },
        { sony1Cs2Id,      "Makernote", "Sony1Cs2",     SonyMakerNote::tagListCs2      },
        { sony1MltCs7DId,  "Makernote", "Sony1MltCs7D", MinoltaMakerNote::tagListCs7D  },
        { sony1MltCsOldId, "Makernote", "Sony1MltCsOld",MinoltaMakerNote::tagListCsStd },
        { sony1MltCsNewId, "Makernote", "Sony1MltCsNew",MinoltaMakerNote::tagListCsStd },
        { sony1MltCsA100Id,"Makernote","Sony1MltCsA100",MinoltaMakerNote::tagListCsA100},
        { sony2CsId,       "Makernote", "Sony2Cs",      SonyMakerNote::tagListCs       },
        { sony2Cs2Id,      "Makernote", "Sony2Cs2",     SonyMakerNote::tagListCs2      },
        { lastId,          "(Last IFD info)", "(Last IFD item)", 0 }
    };

    //! List of all defined Exif sections.
    extern const SectionInfo sectionInfo[] = {
        { sectionIdNotSet, "(UnknownSection)",     N_("Unknown section")              },
        { imgStruct,       "ImageStructure",       N_("Image data structure")         },
        { recOffset,       "RecordingOffset",      N_("Recording offset")             },
        { imgCharacter,    "ImageCharacteristics", N_("Image data characteristics")   },
        { otherTags,       "OtherTags",            N_("Other data")                   },
        { exifFormat,      "ExifFormat",           N_("Exif data structure")          },
        { exifVersion,     "ExifVersion",          N_("Exif version")                 },
        { imgConfig,       "ImageConfig",          N_("Image configuration")          },
        { userInfo,        "UserInfo",             N_("User information")             },
        { relatedFile,     "RelatedFile",          N_("Related file")                 },
        { dateTime,        "DateTime",             N_("Date and time")                },
        { captureCond,     "CaptureConditions",    N_("Picture taking conditions")    },
        { gpsTags,         "GPS",                  N_("GPS information")              },
        { iopTags,         "Interoperability",     N_("Interoperability information") },
        { makerTags,       "Makernote",            N_("Vendor specific information")  },
        { dngTags,         "DngTags",              N_("Adobe DNG tags")               },
        { panaRaw,         "PanasonicRaw",         N_("Panasonic RAW tags")           },
        { tiffEp,          "TIFF/EP",              N_("TIFF/EP tags")                 },
        { tiffPm6,         "TIFF&PM6",             N_("TIFF PageMaker 6.0 tags")      },
        { adobeOpi,        "AdobeOPI",             N_("Adobe OPI tags")               },
        { lastSectionId,   "(LastSection)",        N_("Last section")                 }
    };

} // namespace Exiv2

namespace Exiv2 {
    namespace Internal {

    bool TagVocabulary::operator==(const std::string& key) const
    {
        if (strlen(voc_) > key.size()) return false;
        return 0 == strcmp(voc_, key.c_str() + key.size() - strlen(voc_));
    }

    //! NewSubfileType, TIFF tag 0x00fe - this is actually a bitmask
    extern const TagDetails exifNewSubfileType[] = {
        {  0, N_("Primary image")                                               },
        {  1, N_("Thumbnail/Preview image")                                     },
        {  2, N_("Primary image, Multi page file")                              },
        {  3, N_("Thumbnail/Preview image, Multi page file")                    },
        {  4, N_("Primary image, Transparency mask")                            },
        {  5, N_("Thumbnail/Preview image, Transparency mask")                  },
        {  6, N_("Primary image, Multi page file, Transparency mask")           },
        {  7, N_("Thumbnail/Preview image, Multi page file, Transparency mask") },
        {  7, N_("Thumbnail/Preview image, Multi page file, Transparency mask") }  // To silence compiler warning
    };

    //! SubfileType, TIFF tag 0x00ff
    extern const TagDetails exifSubfileType[] = {
        {  1, N_("Full-resolution image data")                                  },
        {  2, N_("Reduced-resolution image data")                               },
        {  3, N_("A single page of a multi-page image")                         }
    };

    //! Units for measuring X and Y resolution, tags 0x0128, 0xa210
    extern const TagDetails exifUnit[] = {
        { 1, N_("none") },
        { 2, N_("inch") },
        { 3, N_("cm")   }
    };

    //! Compression, tag 0x0103
    extern const TagDetails exifCompression[] = {
        {     1, N_("Uncompressed")             },
        {     2, N_("CCITT RLE")                },
        {     3, N_("T4/Group 3 Fax")           },
        {     4, N_("T6/Group 4 Fax")           },
        {     5, N_("LZW")                      },
        {     6, N_("JPEG (old-style)")         },
        {     7, N_("JPEG")                     },
        {     8, N_("Adobe Deflate")            },
        {     9, N_("JBIG B&W")                 },
        {    10, N_("JBIG Color")               },
        { 32766, N_("Next 2-bits RLE")          },
        { 32769, N_("Epson ERF Compressed")     },
        { 32770, N_("Samsung SRW Compressed")   },
        { 32771, N_("CCITT RLE 1-word")         },
        { 32773, N_("PackBits (Macintosh RLE)") },
        { 32809, N_("Thunderscan RLE")          },
        { 32895, N_("IT8 CT Padding")           },
        { 32896, N_("IT8 Linework RLE")         },
        { 32897, N_("IT8 Monochrome Picture")   },
        { 32898, N_("IT8 Binary Lineart")       },
        { 32908, N_("Pixar Film (10-bits LZW)") },
        { 32909, N_("Pixar Log (11-bits ZIP)")  },
        { 32946, N_("Pixar Deflate")            },
        { 32947, N_("Kodak DCS Encoding")       },
        { 34661, N_("ISO JBIG")                 },
        { 34676, N_("SGI Log Luminance RLE")    },
        { 34677, N_("SGI Log 24-bits packed")   },
        { 34712, N_("Leadtools JPEG 2000")      },
        { 34713, N_("Nikon NEF Compressed")     },
        { 65000, N_("Kodak DCR Compressed")     },
        { 65535, N_("Pentax PEF Compressed")    }
    };

    //! PhotometricInterpretation, tag 0x0106
    extern const TagDetails exifPhotometricInterpretation[] = {
        {     0, N_("White Is Zero")      },
        {     1, N_("Black Is Zero")      },
        {     2, N_("RGB")                },
        {     3, N_("RGB Palette")        },
        {     4, N_("Transparency Mask")  },
        {     5, N_("CMYK")               },
        {     6, N_("YCbCr")              },
        {     8, N_("CIELab")             },
        {     9, N_("ICCLab")             },
        {    10, N_("ITULab")             },
        { 32803, N_("Color Filter Array") },
        { 32844, N_("Pixar LogL")         },
        { 32845, N_("Pixar LogLuv")       },
        { 34892, N_("Linear Raw")         }
    };

    //! Threshholding, tag 0x0107
    extern const TagDetails exifThreshholding[] = {
        { 1, N_("No dithering or halftoning")           },
        { 2, N_("Ordered dither or halftone technique") },
        { 3, N_("Randomized process")                   }
    };

    //! Orientation, tag 0x0112
    extern const TagDetails exifOrientation[] = {
        { 1, N_("top, left")     },
        { 2, N_("top, right")    },
        { 3, N_("bottom, right") },
        { 4, N_("bottom, left")  },
        { 5, N_("left, top")     },
        { 6, N_("right, top")    },
        { 7, N_("right, bottom") },
        { 8, N_("left, bottom")  },
        { 8, N_("left, bottom")  }              // To silence compiler warning
    };

    //! Predictor, tag 0x013d
    extern const TagDetails exifPredictor[] = {
        { 1, N_("No prediction scheme used") },
        { 2, N_("Horizontal differencing")   }
    };

    //! InkSet, tag 0x014c
    extern const TagDetails exifInkSet[] = {
        { 1, N_("CMYK")     },
        { 2, N_("not CMYK") }
    };

    //! SampleFormat, tag 0x0153
    extern const TagDetails exifSampleFormat[] = {
        { 1, N_("Unsigned integer data")                },
        { 2, N_("Two's complement signed integer data") },
        { 3, N_("IEEE floating point data")             },
        { 4, N_("Undefined data format")                },
        { 4, N_("Undefined data format")                } // To silence compiler warning
    };

    //! Indexed, tag 0x015a
    extern const TagDetails exifIndexed[] = {
        { 0, N_("Not indexed") },
        { 1, N_("Indexed")     }
    };

    //! exifJpegLosslessPredictor, tag 0x0205
    extern const TagDetails exifJpegLosslessPredictor[] = {
        { 1, N_("A")           },
        { 2, N_("B")           },
        { 3, N_("C")           },
        { 4, N_("A+B-C")       },
        { 5, N_("A+((B-C)/2)") },
        { 6, N_("B+((A-C)/2)") },
        { 7, N_("(A+B)/2")     }
    };

    //! YCbCrPositioning, tag 0x0213
    extern const TagDetails exifYCbCrPositioning[] = {
        { 1, N_("Centered") },
        { 2, N_("Co-sited") }
    };

    //! Flash, Exif tag 0x9209
    extern const TagDetails exifFlash[] = {
        { 0x00, N_("No flash")                                                      },
        { 0x01, N_("Fired")                                                         },
        { 0x05, N_("Fired, return light not detected")                              },
        { 0x07, N_("Fired, return light detected")                                  },
        { 0x08, N_("Yes, did not fire")                                             },
        { 0x09, N_("Yes, compulsory")                                               },
        { 0x0d, N_("Yes, compulsory, return light not detected")                    },
        { 0x0f, N_("Yes, compulsory, return light detected")                        },
        { 0x10, N_("No, compulsory")                                                },
        { 0x14, N_("No, did not fire, return light not detected")                   },
        { 0x18, N_("No, auto")                                                      },
        { 0x19, N_("Yes, auto")                                                     },
        { 0x1d, N_("Yes, auto, return light not detected")                          },
        { 0x1f, N_("Yes, auto, return light detected")                              },
        { 0x20, N_("No flash function")                                             },
        { 0x20, N_("No, no flash function")                                         },
        { 0x41, N_("Yes, red-eye reduction")                                        },
        { 0x45, N_("Yes, red-eye reduction, return light not detected")             },
        { 0x47, N_("Yes, red-eye reduction, return light detected")                 },
        { 0x49, N_("Yes, compulsory, red-eye reduction")                            },
        { 0x4d, N_("Yes, compulsory, red-eye reduction, return light not detected") },
        { 0x4f, N_("Yes, compulsory, red-eye reduction, return light detected")     },
        { 0x50, N_("No, red-eye reduction")                                         },
        { 0x58, N_("No, auto, red-eye reduction")                                   },
        { 0x59, N_("Yes, auto, red-eye reduction")                                  },
        { 0x5d, N_("Yes, auto, red-eye reduction, return light not detected")       },
        { 0x5f, N_("Yes, auto, red-eye reduction, return light detected")           }
    };

    //! CFALayout, tag 0xc617
    extern const TagDetails exifCfaLayout[] = {
        { 1, N_("Rectangular (or square) layout") },
        { 2, N_("Staggered layout A: even columns are offset down by 1/2 row")  },
        { 3, N_("Staggered layout B: even columns are offset up by 1/2 row")    },
        { 4, N_("Staggered layout C: even rows are offset right by 1/2 column") },
        { 5, N_("Staggered layout D: even rows are offset left by 1/2 column")  }
    };

    //! Base IFD Tags (IFD0 and IFD1)
    static const TagInfo ifdTagInfo[] = {
        TagInfo(0x000b, "ProcessingSoftware", N_("Processing Software"),
                N_("The name and version of the software used to post-process "
                   "the picture."), // ACD Systems Digital Imaging tag
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x00fe, "NewSubfileType", N_("New Subfile Type"),
                N_("A general indication of the kind of data contained in this subfile."),
                ifd0Id, imgStruct, unsignedLong, 1, EXV_PRINT_TAG(exifNewSubfileType)), // TIFF tag
        TagInfo(0x00ff, "SubfileType", N_("Subfile Type"),
                N_("A general indication of the kind of data contained in this subfile. "
                   "This field is deprecated. The NewSubfileType field should be used instead."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifSubfileType)), // TIFF tag
        TagInfo(0x0100, "ImageWidth", N_("Image Width"),
                N_("The number of columns of image data, equal to the number of "
                "pixels per row. In JPEG compressed data a JPEG marker is "
                "used instead of this tag."),
                ifd0Id, imgStruct, unsignedLong, 1, printValue),
        TagInfo(0x0101, "ImageLength", N_("Image Length"),
                N_("The number of rows of image data. In JPEG compressed data a "
                "JPEG marker is used instead of this tag."),
                ifd0Id, imgStruct, unsignedLong, 1, printValue),
        TagInfo(0x0102, "BitsPerSample", N_("Bits per Sample"),
                N_("The number of bits per image component. In this standard each "
                "component of the image is 8 bits, so the value for this "
                "tag is 8. See also <SamplesPerPixel>. In JPEG compressed data "
                "a JPEG marker is used instead of this tag."),
                ifd0Id, imgStruct, unsignedShort, 3, printValue),
        TagInfo(0x0103, "Compression", N_("Compression"),
                N_("The compression scheme used for the image data. When a "
                "primary image is JPEG compressed, this designation is "
                "not necessary and is omitted. When thumbnails use JPEG "
                "compression, this tag value is set to 6."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifCompression)),
        TagInfo(0x0106, "PhotometricInterpretation", N_("Photometric Interpretation"),
                N_("The pixel composition. In JPEG compressed data a JPEG "
                "marker is used instead of this tag."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifPhotometricInterpretation)),
        TagInfo(0x0107, "Threshholding", N_("Threshholding"),
                N_("For black and white TIFF files that represent shades of gray, "
                   "the technique used to convert from gray to black and white pixels."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifThreshholding)), // TIFF tag
        TagInfo(0x0108, "CellWidth", N_("Cell Width"),
                N_("The width of the dithering or halftoning matrix used to create a "
                   "dithered or halftoned bilevel file."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0109, "CellLength", N_("Cell Length"),
                N_("The length of the dithering or halftoning matrix used to create a "
                   "dithered or halftoned bilevel file."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x010a, "FillOrder", N_("Fill Order"),
                N_("The logical order of bits within a byte"),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x010d, "DocumentName", N_("Document Name"),
                N_("The name of the document from which this image was scanned"),
                ifd0Id, imgStruct, asciiString, 0, printValue), // TIFF tag
        TagInfo(0x010e, "ImageDescription", N_("Image Description"),
                N_("A character string giving the title of the image. It may be "
                "a comment such as \"1988 company picnic\" or "
                "the like. Two-bytes character codes cannot be used. "
                "When a 2-bytes code is necessary, the Exif Private tag "
                "<UserComment> is to be used."),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x010f, "Make", N_("Manufacturer"),
                N_("The manufacturer of the recording "
                "equipment. This is the manufacturer of the DSC, scanner, "
                "video digitizer or other equipment that generated the "
                "image. When the field is left blank, it is treated as unknown."),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x0110, "Model", N_("Model"),
                N_("The model name or model number of the equipment. This is the "
                "model name or number of the DSC, scanner, video digitizer "
                "or other equipment that generated the image. When the field "
                "is left blank, it is treated as unknown."),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x0111, "StripOffsets", N_("Strip Offsets"),
                N_("For each strip, the byte offset of that strip. It is "
                "recommended that this be selected so the number of strip "
                "bytes does not exceed 64 Kbytes. With JPEG compressed "
                "data this designation is not needed and is omitted. See also "
                "<RowsPerStrip> and <StripByteCounts>."),
                ifd0Id, recOffset, unsignedLong, -1, printValue),
        TagInfo(0x0112, "Orientation", N_("Orientation"),
                N_("The image orientation viewed in terms of rows and columns."),
                ifd0Id, imgStruct, unsignedShort, 1, print0x0112),
        TagInfo(0x0115, "SamplesPerPixel", N_("Samples per Pixel"),
                N_("The number of components per pixel. Since this standard applies "
                "to RGB and YCbCr images, the value set for this tag is 3. "
                "In JPEG compressed data a JPEG marker is used instead of this tag."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue),
        TagInfo(0x0116, "RowsPerStrip", N_("Rows per Strip"),
                N_("The number of rows per strip. This is the number of rows "
                "in the image of one strip when an image is divided into "
                "strips. With JPEG compressed data this designation is not "
                "needed and is omitted. See also <StripOffsets> and <StripByteCounts>."),
                ifd0Id, recOffset, unsignedLong, 1, printValue),
        TagInfo(0x0117, "StripByteCounts", N_("Strip Byte Count"),
                N_("The total number of bytes in each strip. With JPEG compressed "
                "data this designation is not needed and is omitted."),
                ifd0Id, recOffset, unsignedLong, -1, printValue),
        TagInfo(0x011a, "XResolution", N_("X-Resolution"),
                N_("The number of pixels per <ResolutionUnit> in the <ImageWidth> "
                "direction. When the image resolution is unknown, 72 [dpi] is designated."),
                ifd0Id, imgStruct, unsignedRational, 1, printLong),
        TagInfo(0x011b, "YResolution", N_("Y-Resolution"),
                N_("The number of pixels per <ResolutionUnit> in the <ImageLength> "
                "direction. The same value as <XResolution> is designated."),
                ifd0Id, imgStruct, unsignedRational, 1, printLong),
        TagInfo(0x011c, "PlanarConfiguration", N_("Planar Configuration"),
                N_("Indicates whether pixel components are recorded in a chunky "
                "or planar format. In JPEG compressed files a JPEG marker "
                "is used instead of this tag. If this field does not exist, "
                "the TIFF default of 1 (chunky) is assumed."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue),
        TagInfo(0x0122, "GrayResponseUnit", N_("Gray Response Unit"),
                N_("The precision of the information contained in the GrayResponseCurve."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0123, "GrayResponseCurve", N_("Gray Response Curve"),
                N_("For grayscale data, the optical density of each possible pixel value."),
                ifd0Id, imgStruct, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0124, "T4Options", N_("T4 Options"),
                N_("T.4-encoding options."),
                ifd0Id, imgStruct, unsignedLong, 1, printValue), // TIFF tag
        TagInfo(0x0125, "T6Options", N_("T6 Options"),
                N_("T.6-encoding options."),
                ifd0Id, imgStruct, unsignedLong, 1, printValue), // TIFF tag
        TagInfo(0x0128, "ResolutionUnit", N_("Resolution Unit"),
                N_("The unit for measuring <XResolution> and <YResolution>. The same "
                "unit is used for both <XResolution> and <YResolution>. If "
                "the image resolution is unknown, 2 (inches) is designated."),
                ifd0Id, imgStruct, unsignedShort, 1, printExifUnit),
        TagInfo(0x012d, "TransferFunction", N_("Transfer Function"),
                N_("A transfer function for the image, described in tabular style. "
                "Normally this tag is not necessary, since color space is "
                "specified in the color space information tag (<ColorSpace>)."),
                ifd0Id, imgCharacter, unsignedShort, 3*256, printValue),
        TagInfo(0x0131, "Software", N_("Software"),
                N_("This tag records the name and version of the software or "
                "firmware of the camera or image input device used to "
                "generate the image. The detailed format is not specified, but "
                "it is recommended that the example shown below be "
                "followed. When the field is left blank, it is treated as unknown."),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x0132, "DateTime", N_("Date and Time"),
                N_("The date and time of image creation. In Exif standard, "
                "it is the date and time the file was changed."),
                ifd0Id, otherTags, asciiString, 20, printValue),
        TagInfo(0x013b, "Artist", N_("Artist"),
                N_("This tag records the name of the camera owner, photographer or "
                "image creator. The detailed format is not specified, but it is "
                "recommended that the information be written as in the example "
                "below for ease of Interoperability. When the field is "
                "left blank, it is treated as unknown. Ex.) \"Camera owner, John "
                "Smith; Photographer, Michael Brown; Image creator, Ken James\""),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x013c, "HostComputer", N_("Host Computer"),
                N_("This tag records information about the host computer used "
                "to generate the image."),
                ifd0Id, otherTags, asciiString, 0, printValue),
        TagInfo(0x013d, "Predictor", N_("Predictor"),
                N_("A predictor is a mathematical operator that is applied to "
                   "the image data before an encoding scheme is applied."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifPredictor)), // TIFF tag
        TagInfo(0x013e, "WhitePoint", N_("White Point"),
                N_("The chromaticity of the white point of the image. Normally "
                "this tag is not necessary, since color space is specified "
                "in the colorspace information tag (<ColorSpace>)."),
                ifd0Id, imgCharacter, unsignedRational, 2, printValue),
        TagInfo(0x013f, "PrimaryChromaticities", N_("Primary Chromaticities"),
                N_("The chromaticity of the three primary colors of the image. "
                "Normally this tag is not necessary, since colorspace is "
                "specified in the colorspace information tag (<ColorSpace>)."),
                ifd0Id, imgCharacter, unsignedRational, 6, printValue),
        TagInfo(0x0140, "ColorMap", N_("Color Map"),
                N_("A color map for palette color images. This field defines "
                   "a Red-Green-Blue color map (often called a lookup table) "
                   "for palette-color images. In a palette-color image, a "
                   "pixel value is used to index into an RGB lookup table."),
                ifd0Id, imgCharacter, unsignedShort, -1, printValue),
        TagInfo(0x0141, "HalftoneHints", N_("Halftone Hints"),
                N_("The purpose of the HalftoneHints field is to convey to the "
                   "halftone function the range of gray levels within a "
                   "colorimetrically-specified image that should retain tonal detail."),
                ifd0Id, imgStruct, unsignedShort, 2, printValue), // TIFF tag
        TagInfo(0x0142, "TileWidth", N_("Tile Width"),
                N_("The tile width in pixels. This is the number of columns in each tile."),
                ifd0Id, recOffset, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0143, "TileLength", N_("Tile Length"),
                N_("The tile length (height) in pixels. This is the number of rows in each tile."),
                ifd0Id, recOffset, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0144, "TileOffsets", N_("Tile Offsets"),
                N_("For each tile, the byte offset of that tile, as compressed and "
                   "stored on disk. The offset is specified with respect to the "
                   "beginning of the TIFF file. Note that this implies that each "
                   "tile has a location independent of the locations of other tiles."),
                ifd0Id, recOffset, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0145, "TileByteCounts", N_("Tile Byte Counts"),
                N_("For each tile, the number of (compressed) bytes in that tile. See "
                   "TileOffsets for a description of how the byte counts are ordered."),
                ifd0Id, recOffset, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x014a, "SubIFDs", N_("SubIFD Offsets"),
                N_("Defined by Adobe Corporation to enable TIFF Trees within a TIFF file."),
                ifd0Id, tiffEp, unsignedLong, -1, printValue),
        TagInfo(0x014c, "InkSet", N_("Ink Set"),
                N_("The set of inks used in a separated (PhotometricInterpretation=5) image."),
                ifd0Id, imgStruct, unsignedShort, 1, EXV_PRINT_TAG(exifInkSet)), // TIFF tag
        TagInfo(0x014d, "InkNames", N_("Ink Names"),
                N_("The name of each ink used in a separated (PhotometricInterpretation=5) image."),
                ifd0Id, imgStruct, asciiString, 0, printValue), // TIFF tag
        TagInfo(0x014e, "NumberOfInks", N_("Number Of Inks"),
                N_("The number of inks. Usually equal to SamplesPerPixel, unless there are extra samples."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0150, "DotRange", N_("Dot Range"),
                N_("The component values that correspond to a 0% dot and 100% dot."),
                ifd0Id, imgStruct, unsignedByte, -1, printValue), // TIFF tag
        TagInfo(0x0151, "TargetPrinter", N_("Target Printer"),
                N_("A description of the printing environment for which this separation is intended."),
                ifd0Id, imgStruct, asciiString, 0, printValue), // TIFF tag
        TagInfo(0x0152, "ExtraSamples", N_("Extra Samples"),
                N_("Specifies that each pixel has m extra components whose interpretation "
                   "is defined by one of the values listed below."),
                ifd0Id, imgStruct, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0153, "SampleFormat", N_("Sample Format"),
                N_("This field specifies how to interpret each data sample in a pixel."),
                ifd0Id, imgStruct, unsignedShort, -1, EXV_PRINT_TAG(exifSampleFormat)), // TIFF tag
        TagInfo(0x0154, "SMinSampleValue", N_("SMin Sample Value"),
                N_("This field specifies the minimum sample value."),
                ifd0Id, imgStruct, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0155, "SMaxSampleValue", N_("SMax Sample Value"),
                N_("This field specifies the maximum sample value."),
                ifd0Id, imgStruct, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0156, "TransferRange", N_("Transfer Range"),
                N_("Expands the range of the TransferFunction"),
                ifd0Id, imgCharacter, unsignedShort, 6, printValue), // TIFF tag
        TagInfo(0x0157, "ClipPath", N_("Clip Path"),
                N_("A TIFF ClipPath is intended to mirror the essentials of PostScript's "
                   "path creation functionality."),
                ifd0Id, tiffPm6, unsignedByte, -1, printValue), // TIFF&PM6 tag
        TagInfo(0x0158, "XClipPathUnits", N_("X Clip Path Units"),
                N_("The number of units that span the width of the image, in terms of "
                   "integer ClipPath coordinates."),
                ifd0Id, tiffPm6, signedShort, 1, printValue), // TIFF&PM6 tag
        TagInfo(0x0159, "YClipPathUnits", N_("Y Clip Path Units"),
                N_("The number of units that span the height of the image, in terms of "
                   "integer ClipPath coordinates."),
                ifd0Id, tiffPm6, signedShort, 1, printValue), // TIFF&PM6 tag
        TagInfo(0x015a, "Indexed", N_("Indexed"),
                N_("Indexed images are images where the 'pixels' do not represent color "
                   "values, but rather an index (usually 8-bit) into a separate color "
                   "table, the ColorMap."),
                ifd0Id, tiffPm6, unsignedShort, 1, EXV_PRINT_TAG(exifIndexed)), // TIFF&PM6 tag
        TagInfo(0x015b, "JPEGTables", N_("JPEG tables"),
                N_("This optional tag may be used to encode the JPEG quantization and"
                   "Huffman tables for subsequent use by the JPEG decompression process."),
                ifd0Id, imgStruct, undefined, 0, printValue), // TIFF/EP tag
        TagInfo(0x015F, "OPIProxy", N_("OPI Proxy"),
                N_("OPIProxy gives information concerning whether this image is a "
                   "low-resolution proxy of a high-resolution image (Adobe OPI)."),
                ifd0Id, adobeOpi, unsignedShort, 1, printValue), // Adobe OPI tag
        TagInfo(0x0200, "JPEGProc", N_("JPEG Process"),
                N_("This field indicates the process used to produce the compressed data"),
                ifd0Id, recOffset, unsignedLong, 1, printValue), // TIFF tag
        TagInfo(0x0201, "JPEGInterchangeFormat", N_("JPEG Interchange Format"),
                N_("The offset to the start byte (SOI) of JPEG compressed "
                "thumbnail data. This is not used for primary image JPEG data."),
                ifd0Id, recOffset, unsignedLong, 1, printValue),
        TagInfo(0x0202, "JPEGInterchangeFormatLength", N_("JPEG Interchange Format Length"),
                N_("The number of bytes of JPEG compressed thumbnail data. This "
                "is not used for primary image JPEG data. JPEG thumbnails "
                "are not divided but are recorded as a continuous JPEG "
                "bitstream from SOI to EOI. Appn and COM markers should "
                "not be recorded. Compressed thumbnails must be recorded in no "
                "more than 64 Kbytes, including all other data to be recorded in APP1."),
                ifd0Id, recOffset, unsignedLong, 1, printValue),
        TagInfo(0x0203, "JPEGRestartInterval", N_("JPEG Restart Interval"),
                N_("This Field indicates the length of the restart interval used "
                   "in the compressed image data."),
                ifd0Id, imgStruct, unsignedShort, 1, printValue), // TIFF tag
        TagInfo(0x0205, "JPEGLosslessPredictors", N_("JPEG Lossless Predictors"),
                N_("This Field points to a list of lossless predictor-selection "
                   "values, one per component."),
                ifd0Id, imgStruct, unsignedShort, -1, EXV_PRINT_TAG(exifJpegLosslessPredictor)), // TIFF tag
        TagInfo(0x0206, "JPEGPointTransforms", N_("JPEG Point Transforms"),
                N_("This Field points to a list of point transform values, one per component."),
                ifd0Id, imgStruct, unsignedShort, -1, printValue), // TIFF tag
        TagInfo(0x0207, "JPEGQTables", N_("JPEG Q-Tables"),
                N_("This Field points to a list of offsets to the quantization tables, "
                   "one per component."),
                ifd0Id, imgStruct, unsignedLong, -1, printValue), // TIFF tag
        TagInfo(0x0208, "JPEGDCTables", N_("JPEG DC-Tables"),
                N_("This Field points to a list of offsets to the DC Huffman tables or "
                   "the lossless Huffman tables, one per component."),
                ifd0Id, imgStruct, unsignedLong, -1, printValue), // TIFF tag
        TagInfo(0x0209, "JPEGACTables", N_("JPEG AC-Tables"),
                N_("This Field points to a list of offsets to the Huffman AC tables, "
                   "one per component."),
                ifd0Id, imgStruct, unsignedLong, -1, printValue), // TIFF tag
        TagInfo(0x0211, "YCbCrCoefficients", N_("YCbCr Coefficients"),
                N_("The matrix coefficients for transformation from RGB to YCbCr "
                "image data. No default is given in TIFF; but here the "
                "value given in Appendix E, \"Color Space Guidelines\", is used "
                "as the default. The color space is declared in a "
                "color space information tag, with the default being the value "
                "that gives the optimal image characteristics "
                "Interoperability this condition."),
                ifd0Id, imgCharacter, unsignedRational, 3, printValue),
        TagInfo(0x0212, "YCbCrSubSampling", N_("YCbCr Sub-Sampling"),
                N_("The sampling ratio of chrominance components in relation to the "
                "luminance component. In JPEG compressed data a JPEG marker "
                "is used instead of this tag."),
                ifd0Id, imgStruct, unsignedShort, 2, printValue),
        TagInfo(0x0213, "YCbCrPositioning", N_("YCbCr Positioning"),
                N_("The position of chrominance components in relation to the "
                "luminance component. This field is designated only for "
                "JPEG compressed data or uncompressed YCbCr data. The TIFF "
                "default is 1 (centered); but when Y:Cb:Cr = 4:2:2 it is "
                "recommended in this standard that 2 (co-sited) be used to "
                "record data, in order to improve the image quality when viewed "
                "on TV systems. When this field does not exist, the reader shall "
                "assume the TIFF default. In the case of Y:Cb:Cr = 4:2:0, the "
                "TIFF default (centered) is recommended. If the reader "
                "does not have the capability of supporting both kinds of "
                "<YCbCrPositioning>, it shall follow the TIFF default regardless "
                "of the value in this field. It is preferable that readers "
                "be able to support both centered and co-sited positioning."),
                ifd0Id, imgStruct, unsignedShort, 1, print0x0213),
        TagInfo(0x0214, "ReferenceBlackWhite", N_("Reference Black/White"),
                N_("The reference black point value and reference white point "
                "value. No defaults are given in TIFF, but the values "
                "below are given as defaults here. The color space is declared "
                "in a color space information tag, with the default "
                "being the value that gives the optimal image characteristics "
                "Interoperability these conditions."),
                ifd0Id, imgCharacter, unsignedRational, 6, printValue),
        TagInfo(0x02bc, "XMLPacket", N_("XML Packet"),
                N_("XMP Metadata (Adobe technote 9-14-02)"),
                ifd0Id, otherTags, unsignedByte, -1, printValue),
        TagInfo(0x4746, "Rating", N_("Windows Rating"),
                N_("Rating tag used by Windows"),
                ifd0Id, otherTags, unsignedShort, -1, printValue), // Windows Tag
        TagInfo(0x4749, "RatingPercent", N_("Windows Rating Percent"),
                N_("Rating tag used by Windows, value in percent"),
                ifd0Id, otherTags, unsignedShort, -1, printValue), // Windows Tag
        TagInfo(0x800d, "ImageID", N_("Image ID"),
                N_("ImageID is the full pathname of the original, high-resolution image, "
                   "or any other identifying string that uniquely identifies the original "
                   "image (Adobe OPI)."),
                ifd0Id, adobeOpi, asciiString, 0, printValue), // Adobe OPI tag
        TagInfo(0x828d, "CFARepeatPatternDim", N_("CFA Repeat Pattern Dimension"),
                N_("Contains two values representing the minimum rows and columns "
                "to define the repeating patterns of the color filter array"),
                ifd0Id, tiffEp, unsignedShort, 2, printValue), // TIFF/EP Tag
        TagInfo(0x828e, "CFAPattern", N_("CFA Pattern"),
                N_("Indicates the color filter array (CFA) geometric pattern of the image "
                "sensor when a one-chip color area sensor is used. It does not apply to "
                "all sensing methods"),
                ifd0Id, tiffEp, unsignedByte, -1, printValue), // TIFF/EP Tag
        TagInfo(0x828f, "BatteryLevel", N_("Battery Level"),
                "Contains a value of the battery level as a fraction or string",
                ifd0Id, tiffEp, unsignedRational, 1, printValue), // TIFF/EP Tag
        TagInfo(0x8298, "Copyright", N_("Copyright"),
                N_("Copyright information. In this standard the tag is used to "
                "indicate both the photographer and editor copyrights. It is "
                "the copyright notice of the person or organization claiming "
                "rights to the image. The Interoperability copyright "
                "statement including date and rights should be written in this "
                "field; e.g., \"Copyright, John Smith, 19xx. All rights "
                "reserved.\". In this standard the field records both the "
                "photographer and editor copyrights, with each recorded in a "
                "separate part of the statement. When there is a clear distinction "
                "between the photographer and editor copyrights, these are to be "
                "written in the order of photographer followed by editor copyright, "
                "separated by NULL (in this case since the statement also ends with "
                "a NULL, there are two NULL codes). When only the photographer "
                "copyright is given, it is terminated by one NULL code . When only "
                "the editor copyright is given, the photographer copyright part "
                "consists of one space followed by a terminating NULL code, then "
                "the editor copyright is given. When the field is left blank, it is "
                "treated as unknown."),
                ifd0Id, otherTags, asciiString, 0, print0x8298),
        TagInfo(0x829a, "ExposureTime", N_("Exposure Time"), N_("Exposure time, given in seconds."), ifd0Id, tiffEp, unsignedRational, 1, print0x829a), // TIFF/EP tag
        TagInfo(0x829d, "FNumber", N_("FNumber"), N_("The F number."), ifd0Id, tiffEp, unsignedRational, 1, print0x829d), // TIFF/EP tag
        TagInfo(0x83bb, "IPTCNAA", N_("IPTC/NAA"),
                N_("Contains an IPTC/NAA record"),
                ifd0Id, tiffEp, unsignedLong, 0, printValue), // TIFF/EP Tag
        TagInfo(0x8649, "ImageResources", N_("Image Resources Block"),
                N_("Contains information embedded by the Adobe Photoshop application"),
                ifd0Id, otherTags, unsignedByte, -1, printValue),
        TagInfo(0x8769, "ExifTag", N_("Exif IFD Pointer"),
                N_("A pointer to the Exif IFD. Interoperability, Exif IFD has the "
                "same structure as that of the IFD specified in TIFF. "
                "ordinarily, however, it does not contain image data as in "
                "the case of TIFF."),
                ifd0Id, exifFormat, unsignedLong, 1, printValue),
        TagInfo(0x8773, "InterColorProfile", N_("Inter Color Profile"),
                N_("Contains an InterColor Consortium (ICC) format color space characterization/profile"),
                ifd0Id, tiffEp, undefined, -1, printValue),
        TagInfo(0x8822, "ExposureProgram", N_("Exposure Program"), N_("The class of the program used by the camera to set exposure when the picture is taken."), ifd0Id, tiffEp, unsignedShort, 1, print0x8822), // TIFF/EP tag
        TagInfo(0x8824, "SpectralSensitivity", N_("Spectral Sensitivity"), N_("Indicates the spectral sensitivity of each channel of the camera used."), ifd0Id, tiffEp, asciiString, 0, printValue), // TIFF/EP tag
        TagInfo(0x8825, "GPSTag", N_("GPS Info IFD Pointer"),
                N_("A pointer to the GPS Info IFD. The "
                "Interoperability structure of the GPS Info IFD, like that of "
                "Exif IFD, has no image data."),
                ifd0Id, exifFormat, unsignedLong, 1, printValue),
        TagInfo(0x8827, "ISOSpeedRatings", N_("ISO Speed Ratings"), N_("Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232."), ifd0Id, tiffEp, unsignedShort, 0, print0x8827), // TIFF/EP tag
        TagInfo(0x8828, "OECF", N_("OECF"), N_("Indicates the Opto-Electric Conversion Function (OECF) specified in ISO 14524."), ifd0Id, tiffEp, undefined, 0, printValue), // TIFF/EP tag
        TagInfo(0x8829, "Interlace", N_("Interlace"), N_("Indicates the field number of multifield images."), ifd0Id, tiffEp, unsignedShort, 1, printValue), // TIFF/EP tag
        TagInfo(0x882a, "TimeZoneOffset", N_("Time Zone Offset"),
                N_("This optional tag encodes the time zone of the camera clock (relative"
                   "to Greenwich Mean Time) used to create the DataTimeOriginal tag-value"
                   "when the picture was taken. It may also contain the time zone offset"
                   "of the clock used to create the DateTime tag-value when the image was"
                   "modified."),
                ifd0Id, tiffEp, signedShort, -1, printValue),
        TagInfo(0x882b, "SelfTimerMode", N_("Self Timer Mode"), N_("Number of seconds image capture was delayed from button press."), ifd0Id, tiffEp, unsignedShort, 1, printValue), // TIFF/EP tag
        TagInfo(0x9003, "DateTimeOriginal", N_("Date Time Original"), N_("The date and time when the original image data was generated."), ifd0Id, tiffEp, asciiString, 20, printValue), // TIFF/EP tag
        TagInfo(0x9102, "CompressedBitsPerPixel", N_("Compressed Bits Per Pixel"), N_("Specific to compressed data; states the compressed bits per pixel."), ifd0Id, tiffEp, unsignedRational, 1, printFloat), // TIFF/EP tag
        TagInfo(0x9201, "ShutterSpeedValue", N_("Shutter Speed Value"), N_("Shutter speed."), ifd0Id, tiffEp, signedRational, 1, print0x9201), // TIFF/EP tag
        TagInfo(0x9202, "ApertureValue", N_("Aperture Value"), N_("The lens aperture."), ifd0Id, tiffEp, unsignedRational, 1, print0x9202), // TIFF/EP tag
        TagInfo(0x9203, "BrightnessValue", N_("Brightness Value"), N_("The value of brightness."), ifd0Id, tiffEp, signedRational, 1, printFloat), // TIFF/EP tag
        TagInfo(0x9204, "ExposureBiasValue", N_("Exposure Bias Value"), N_("The exposure bias."), ifd0Id, tiffEp, signedRational, 1, print0x9204), // TIFF/EP tag
        TagInfo(0x9205, "MaxApertureValue", N_("Max Aperture Value"), N_("The smallest F number of the lens."), ifd0Id, tiffEp, unsignedRational, 1, print0x9202), // TIFF/EP tag
        TagInfo(0x9206, "SubjectDistance", N_("Subject Distance"), N_("The distance to the subject, given in meters."), ifd0Id, tiffEp, signedRational, 1, print0x9206), // TIFF/EP tag
        TagInfo(0x9207, "MeteringMode", N_("Metering Mode"), N_("The metering mode."), ifd0Id, tiffEp, unsignedShort, 1, print0x9207), // TIFF/EP tag
        TagInfo(0x9208, "LightSource", N_("Light Source"), N_("The kind of light source."), ifd0Id, tiffEp, unsignedShort, 1, print0x9208), // TIFF/EP tag
        TagInfo(0x9209, "Flash", N_("Flash"), N_("Indicates the status of flash when the image was shot."), ifd0Id, tiffEp, unsignedShort, 1, EXV_PRINT_TAG(exifFlash)), // TIFF/EP tag
        TagInfo(0x920a, "FocalLength", N_("Focal Length"), N_("The actual focal length of the lens, in mm."), ifd0Id, tiffEp, unsignedRational, 1, print0x920a), // TIFF/EP tag
        TagInfo(0x920b, "FlashEnergy", N_("Flash Energy"), N_("Amount of flash energy (BCPS)."), ifd0Id, tiffEp, unsignedRational, 1, printValue), // TIFF/EP tag
        TagInfo(0x920c, "SpatialFrequencyResponse", N_("Spatial Frequency Response"), N_("SFR of the camera."), ifd0Id, tiffEp, undefined, 0, printValue), // TIFF/EP tag
        TagInfo(0x920d, "Noise", N_("Noise"), N_("Noise measurement values."), ifd0Id, tiffEp, undefined, 0, printValue), // TIFF/EP tag
        TagInfo(0x920e, "FocalPlaneXResolution", N_("Focal Plane X Resolution"), N_("Number of pixels per FocalPlaneResolutionUnit (37392) in ImageWidth direction for main image."), ifd0Id, tiffEp, unsignedRational, 1, printValue), // TIFF/EP tag
        TagInfo(0x920f, "FocalPlaneYResolution", N_("Focal Plane Y Resolution"), N_("Number of pixels per FocalPlaneResolutionUnit (37392) in ImageLength direction for main image."), ifd0Id, tiffEp, unsignedRational, 1, printValue), // TIFF/EP tag
        TagInfo(0x9210, "FocalPlaneResolutionUnit", N_("Focal Plane Resolution Unit"), N_("Unit of measurement for FocalPlaneXResolution(37390) and FocalPlaneYResolution(37391)."), ifd0Id, tiffEp, unsignedShort, 1, printValue), // TIFF/EP tag
        TagInfo(0x9211, "ImageNumber", N_("Image Number"), N_("Number assigned to an image, e.g., in a chained image burst."), ifd0Id, tiffEp, unsignedLong, 1, printValue), // TIFF/EP tag
        TagInfo(0x9212, "SecurityClassification", N_("Security Classification"), N_("Security classification assigned to the image."), ifd0Id, tiffEp, asciiString, 0, printValue), // TIFF/EP tag
        TagInfo(0x9213, "ImageHistory", N_("Image History"), N_("Record of what has been done to the image."), ifd0Id, tiffEp, asciiString, 0, printValue), // TIFF/EP tag
        TagInfo(0x9214, "SubjectLocation", N_("Subject Location"), N_("Indicates the location and area of the main subject in the overall scene."), ifd0Id, tiffEp, unsignedShort, 2, printValue), // TIFF/EP tag
        TagInfo(0x9215, "ExposureIndex", N_("Exposure Index"), N_("Encodes the camera exposure index setting when image was captured."), ifd0Id, tiffEp, unsignedRational, 1, printValue), // TIFF/EP tag
        TagInfo(0x9216, "TIFFEPStandardID", N_("TIFF/EP Standard ID"),
                N_("Contains four ASCII characters representing the TIFF/EP standard "
                "version of a TIFF/EP file, eg '1', '0', '0', '0'"),
                ifd0Id, tiffEp, unsignedByte, 4, printValue), // TIFF/EP Tag
        TagInfo(0x9217, "SensingMethod", N_("Sensing Method"), N_("Type of image sensor."), ifd0Id, tiffEp, unsignedShort, 1, printValue), // TIFF/EP tag
        TagInfo(0x9c9b, "XPTitle", N_("Windows Title"),
                N_("Title tag used by Windows, encoded in UCS2"),
                ifd0Id, otherTags, unsignedByte, -1, printUcs2), // Windows Tag
        TagInfo(0x9c9c, "XPComment", N_("Windows Comment"),
                N_("Comment tag used by Windows, encoded in UCS2"),
                ifd0Id, otherTags, unsignedByte, -1, printUcs2), // Windows Tag
        TagInfo(0x9c9d, "XPAuthor", N_("Windows Author"),
                N_("Author tag used by Windows, encoded in UCS2"),
                ifd0Id, otherTags, unsignedByte, -1, printUcs2), // Windows Tag
        TagInfo(0x9c9e, "XPKeywords", N_("Windows Keywords"),
                N_("Keywords tag used by Windows, encoded in UCS2"),
                ifd0Id, otherTags, unsignedByte, -1, printUcs2), // Windows Tag
        TagInfo(0x9c9f, "XPSubject", N_("Windows Subject"),
                N_("Subject tag used by Windows, encoded in UCS2"),
                ifd0Id, otherTags, unsignedByte, -1, printUcs2), // Windows Tag
        TagInfo(0xc4a5, "PrintImageMatching", N_("Print Image Matching"),
                N_("Print Image Matching, description needed."),
                ifd0Id, otherTags, undefined, -1, printValue),
        TagInfo(0xc612, "DNGVersion", N_("DNG version"),
                N_("This tag encodes the DNG four-tier version number. For files "
                   "compliant with version 1.1.0.0 of the DNG specification, this "
                   "tag should contain the bytes: 1, 1, 0, 0."),
                ifd0Id, dngTags, unsignedByte, 4, printValue), // DNG tag
        TagInfo(0xc613, "DNGBackwardVersion", N_("DNG backward version"),
                N_("This tag specifies the oldest version of the Digital Negative "
                   "specification for which a file is compatible. Readers should"
                   "not attempt to read a file if this tag specifies a version "
                   "number that is higher than the version number of the specification "
                   "the reader was based on.  In addition to checking the version tags, "
                   "readers should, for all tags, check the types, counts, and values, "
                   "to verify it is able to correctly read the file."),
                ifd0Id, dngTags, unsignedByte, 4, printValue), // DNG tag
        TagInfo(0xc614, "UniqueCameraModel", N_("Unique Camera Model"),
                N_("Defines a unique, non-localized name for the camera model that "
                   "created the image in the raw file. This name should include the "
                   "manufacturer's name to avoid conflicts, and should not be localized, "
                   "even if the camera name itself is localized for different markets "
                   "(see LocalizedCameraModel). This string may be used by reader "
                   "software to index into per-model preferences and replacement profiles."),
                ifd0Id, dngTags, asciiString, 0, printValue), // DNG tag
        TagInfo(0xc615, "LocalizedCameraModel", N_("Localized Camera Model"),
                N_("Similar to the UniqueCameraModel field, except the name can be "
                   "localized for different markets to match the localization of the "
                   "camera name."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc616, "CFAPlaneColor", N_("CFA Plane Color"),
                N_("Provides a mapping between the values in the CFAPattern tag and the "
                   "plane numbers in LinearRaw space. This is a required tag for non-RGB "
                   "CFA images."),
                ifd0Id, dngTags, unsignedByte, -1, printValue), // DNG tag
        TagInfo(0xc617, "CFALayout", N_("CFA Layout"),
                N_("Describes the spatial layout of the CFA."),
                ifd0Id, dngTags, unsignedShort, 1, EXV_PRINT_TAG(exifCfaLayout)), // DNG tag
        TagInfo(0xc618, "LinearizationTable", N_("Linearization Table"),
                N_("Describes a lookup table that maps stored values into linear values. "
                   "This tag is typically used to increase compression ratios by storing "
                   "the raw data in a non-linear, more visually uniform space with fewer "
                   "total encoding levels. If SamplesPerPixel is not equal to one, this "
                   "single table applies to all the samples for each pixel."),
                ifd0Id, dngTags, unsignedShort, -1, printValue), // DNG tag
        TagInfo(0xc619, "BlackLevelRepeatDim", N_("Black Level Repeat Dim"),
                N_("Specifies repeat pattern size for the BlackLevel tag."),
                ifd0Id, dngTags, unsignedShort, 2, printValue), // DNG tag
        TagInfo(0xc61a, "BlackLevel", N_("Black Level"),
                N_("Specifies the zero light (a.k.a. thermal black or black current) "
                   "encoding level, as a repeating pattern. The origin of this pattern "
                   "is the top-left corner of the ActiveArea rectangle. The values are "
                   "stored in row-column-sample scan order."),
                ifd0Id, dngTags, unsignedRational, -1, printValue), // DNG tag
        TagInfo(0xc61b, "BlackLevelDeltaH", N_("Black Level Delta H"),
                N_("If the zero light encoding level is a function of the image column, "
                   "BlackLevelDeltaH specifies the difference between the zero light "
                   "encoding level for each column and the baseline zero light encoding "
                   "level. If SamplesPerPixel is not equal to one, this single table "
                   "applies to all the samples for each pixel."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc61c, "BlackLevelDeltaV", N_("Black Level Delta V"),
                N_("If the zero light encoding level is a function of the image row, "
                   "this tag specifies the difference between the zero light encoding "
                   "level for each row and the baseline zero light encoding level. If "
                   "SamplesPerPixel is not equal to one, this single table applies to "
                   "all the samples for each pixel."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc61d, "WhiteLevel", N_("White Level"),
                N_("This tag specifies the fully saturated encoding level for the raw "
                   "sample values. Saturation is caused either by the sensor itself "
                   "becoming highly non-linear in response, or by the camera's analog "
                   "to digital converter clipping."),
                ifd0Id, dngTags, unsignedShort, -1, printValue), // DNG tag
        TagInfo(0xc61e, "DefaultScale", N_("Default Scale"),
                N_("DefaultScale is required for cameras with non-square pixels. It "
                   "specifies the default scale factors for each direction to convert "
                   "the image to square pixels. Typically these factors are selected "
                   "to approximately preserve total pixel count. For CFA images that "
                   "use CFALayout equal to 2, 3, 4, or 5, such as the Fujifilm SuperCCD, "
                   "these two values should usually differ by a factor of 2.0."),
                ifd0Id, dngTags, unsignedRational, 2, printValue), // DNG tag
        TagInfo(0xc61f, "DefaultCropOrigin", N_("Default Crop Origin"),
                N_("Raw images often store extra pixels around the edges of the final "
                   "image. These extra pixels help prevent interpolation artifacts near "
                   "the edges of the final image. DefaultCropOrigin specifies the origin "
                   "of the final image area, in raw image coordinates (i.e., before the "
                   "DefaultScale has been applied), relative to the top-left corner of "
                   "the ActiveArea rectangle."),
                ifd0Id, dngTags, unsignedShort, 2, printValue), // DNG tag
        TagInfo(0xc620, "DefaultCropSize", N_("Default Crop Size"),
                N_("Raw images often store extra pixels around the edges of the final "
                   "image. These extra pixels help prevent interpolation artifacts near "
                   "the edges of the final image. DefaultCropSize specifies the size of "
                   "the final image area, in raw image coordinates (i.e., before the "
                   "DefaultScale has been applied)."),
                ifd0Id, dngTags, unsignedShort, 2, printValue), // DNG tag
        TagInfo(0xc621, "ColorMatrix1", N_("Color Matrix 1"),
                N_("ColorMatrix1 defines a transformation matrix that converts XYZ "
                   "values to reference camera native color space values, under the "
                   "first calibration illuminant. The matrix values are stored in row "
                   "scan order. The ColorMatrix1 tag is required for all non-monochrome "
                   "DNG files."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc622, "ColorMatrix2", N_("Color Matrix 2"),
                N_("ColorMatrix2 defines a transformation matrix that converts XYZ "
                   "values to reference camera native color space values, under the "
                   "second calibration illuminant. The matrix values are stored in row "
                   "scan order."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc623, "CameraCalibration1", N_("Camera Calibration 1"),
                N_("CameraClalibration1 defines a calibration matrix that transforms "
                   "reference camera native space values to individual camera native "
                   "space values under the first calibration illuminant. The matrix is "
                   "stored in row scan order. This matrix is stored separately from the "
                   "matrix specified by the ColorMatrix1 tag to allow raw converters to "
                   "swap in replacement color matrices based on UniqueCameraModel tag, "
                   "while still taking advantage of any per-individual camera calibration "
                   "performed by the camera manufacturer."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc624, "CameraCalibration2", N_("Camera Calibration 2"),
                N_("CameraCalibration2 defines a calibration matrix that transforms "
                   "reference camera native space values to individual camera native "
                   "space values under the second calibration illuminant. The matrix is "
                   "stored in row scan order. This matrix is stored separately from the "
                   "matrix specified by the ColorMatrix2 tag to allow raw converters to "
                   "swap in replacement color matrices based on UniqueCameraModel tag, "
                   "while still taking advantage of any per-individual camera calibration "
                   "performed by the camera manufacturer."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc625, "ReductionMatrix1", N_("Reduction Matrix 1"),
                N_("ReductionMatrix1 defines a dimensionality reduction matrix for use as "
                   "the first stage in converting color camera native space values to XYZ "
                   "values, under the first calibration illuminant. This tag may only be "
                   "used if ColorPlanes is greater than 3. The matrix is stored in row "
                   "scan order."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc626, "ReductionMatrix2", N_("Reduction Matrix 2"),
                N_("ReductionMatrix2 defines a dimensionality reduction matrix for use as "
                   "the first stage in converting color camera native space values to XYZ "
                   "values, under the second calibration illuminant. This tag may only be "
                   "used if ColorPlanes is greater than 3. The matrix is stored in row "
                   "scan order."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc627, "AnalogBalance", N_("Analog Balance"),
                N_("Normally the stored raw values are not white balanced, since any "
                   "digital white balancing will reduce the dynamic range of the final "
                   "image if the user decides to later adjust the white balance; "
                   "however, if camera hardware is capable of white balancing the color "
                   "channels before the signal is digitized, it can improve the dynamic "
                   "range of the final image. AnalogBalance defines the gain, either "
                   "analog (recommended) or digital (not recommended) that has been "
                   "applied the stored raw values."),
                ifd0Id, dngTags, unsignedRational, -1, printValue), // DNG tag
        TagInfo(0xc628, "AsShotNeutral", N_("As Shot Neutral"),
                N_("Specifies the selected white balance at time of capture, encoded as "
                   "the coordinates of a perfectly neutral color in linear reference "
                   "space values. The inclusion of this tag precludes the inclusion of "
                   "the AsShotWhiteXY tag."),
                ifd0Id, dngTags, unsignedShort, -1, printValue), // DNG tag
        TagInfo(0xc629, "AsShotWhiteXY", N_("As Shot White XY"),
                N_("Specifies the selected white balance at time of capture, encoded as "
                   "x-y chromaticity coordinates. The inclusion of this tag precludes "
                   "the inclusion of the AsShotNeutral tag."),
                ifd0Id, dngTags, unsignedRational, 2, printValue), // DNG tag
        TagInfo(0xc62a, "BaselineExposure", N_("Baseline Exposure"),
                N_("Camera models vary in the trade-off they make between highlight "
                   "headroom and shadow noise. Some leave a significant amount of "
                   "highlight headroom during a normal exposure. This allows significant "
                   "negative exposure compensation to be applied during raw conversion, "
                   "but also means normal exposures will contain more shadow noise. Other "
                   "models leave less headroom during normal exposures. This allows for "
                   "less negative exposure compensation, but results in lower shadow "
                   "noise for normal exposures. Because of these differences, a raw "
                   "converter needs to vary the zero point of its exposure compensation "
                   "control from model to model. BaselineExposure specifies by how much "
                   "(in EV units) to move the zero point. Positive values result in "
                   "brighter default results, while negative values result in darker "
                   "default results."),
                ifd0Id, dngTags, signedRational, 1, printValue), // DNG tag
        TagInfo(0xc62b, "BaselineNoise", N_("Baseline Noise"),
                N_("Specifies the relative noise level of the camera model at a baseline "
                   "ISO value of 100, compared to a reference camera model. Since noise "
                   "levels tend to vary approximately with the square root of the ISO "
                   "value, a raw converter can use this value, combined with the current "
                   "ISO, to estimate the relative noise level of the current image."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc62c, "BaselineSharpness", N_("Baseline Sharpness"),
                N_("Specifies the relative amount of sharpening required for this camera "
                   "model, compared to a reference camera model. Camera models vary in "
                   "the strengths of their anti-aliasing filters. Cameras with weak or "
                   "no filters require less sharpening than cameras with strong "
                   "anti-aliasing filters."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc62d, "BayerGreenSplit", N_("Bayer Green Split"),
                N_("Only applies to CFA images using a Bayer pattern filter array. This "
                   "tag specifies, in arbitrary units, how closely the values of the "
                   "green pixels in the blue/green rows track the values of the green "
                   "pixels in the red/green rows. A value of zero means the two kinds "
                   "of green pixels track closely, while a non-zero value means they "
                   "sometimes diverge. The useful range for this tag is from 0 (no "
                   "divergence) to about 5000 (quite large divergence)."),
                ifd0Id, dngTags, unsignedLong, 1, printValue), // DNG tag
        TagInfo(0xc62e, "LinearResponseLimit", N_("Linear Response Limit"),
                N_("Some sensors have an unpredictable non-linearity in their response "
                   "as they near the upper limit of their encoding range. This "
                   "non-linearity results in color shifts in the highlight areas of the "
                   "resulting image unless the raw converter compensates for this effect. "
                   "LinearResponseLimit specifies the fraction of the encoding range "
                   "above which the response may become significantly non-linear."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc62f, "CameraSerialNumber", N_("Camera Serial Number"),
                N_("CameraSerialNumber contains the serial number of the camera or camera "
                   "body that captured the image."),
                ifd0Id, dngTags, asciiString, 0, printValue), // DNG tag
        TagInfo(0xc630, "LensInfo", N_("Lens Info"),
                N_("Contains information about the lens that captured the image. If the "
                   "minimum f-stops are unknown, they should be encoded as 0/0."),
                ifd0Id, dngTags, unsignedRational, 4, printValue), // DNG tag
        TagInfo(0xc631, "ChromaBlurRadius", N_("Chroma Blur Radius"),
                N_("ChromaBlurRadius provides a hint to the DNG reader about how much "
                   "chroma blur should be applied to the image. If this tag is omitted, "
                   "the reader will use its default amount of chroma blurring. "
                   "Normally this tag is only included for non-CFA images, since the "
                   "amount of chroma blur required for mosaic images is highly dependent "
                   "on the de-mosaic algorithm, in which case the DNG reader's default "
                   "value is likely optimized for its particular de-mosaic algorithm."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc632, "AntiAliasStrength", N_("Anti Alias Strength"),
                N_("Provides a hint to the DNG reader about how strong the camera's "
                   "anti-alias filter is. A value of 0.0 means no anti-alias filter "
                   "(i.e., the camera is prone to aliasing artifacts with some subjects), "
                   "while a value of 1.0 means a strong anti-alias filter (i.e., the "
                   "camera almost never has aliasing artifacts)."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc633, "ShadowScale", N_("Shadow Scale"),
                N_("This tag is used by Adobe Camera Raw to control the sensitivity of "
                   "its 'Shadows' slider."),
                ifd0Id, dngTags, signedRational, 1, printValue), // DNG tag
        TagInfo(0xc634, "DNGPrivateData", N_("DNG Private Data"),
                N_("Provides a way for camera manufacturers to store private data in the "
                   "DNG file for use by their own raw converters, and to have that data "
                   "preserved by programs that edit DNG files."),
                ifd0Id, dngTags, unsignedByte, -1, printValue), // DNG tag
        TagInfo(0xc635, "MakerNoteSafety", N_("MakerNote Safety"),
                N_("MakerNoteSafety lets the DNG reader know whether the EXIF MakerNote "
                   "tag is safe to preserve along with the rest of the EXIF data. File "
                   "browsers and other image management software processing an image "
                   "with a preserved MakerNote should be aware that any thumbnail "
                   "image embedded in the MakerNote may be stale, and may not reflect "
                   "the current state of the full size image."),
                ifd0Id, dngTags, unsignedShort, 1, printValue), // DNG tag
        TagInfo(0xc65a, "CalibrationIlluminant1", N_("Calibration Illuminant 1"),
                N_("The illuminant used for the first set of color calibration tags "
                   "(ColorMatrix1, CameraCalibration1, ReductionMatrix1). The legal "
                   "values for this tag are the same as the legal values for the "
                   "LightSource EXIF tag."),
                ifd0Id, dngTags, unsignedShort, 1, printValue), // DNG tag
        TagInfo(0xc65b, "CalibrationIlluminant2", N_("Calibration Illuminant 2"),
                N_("The illuminant used for an optional second set of color calibration "
                   "tags (ColorMatrix2, CameraCalibration2, ReductionMatrix2). The legal "
                   "values for this tag are the same as the legal values for the "
                   "CalibrationIlluminant1 tag; however, if both are included, neither "
                   "is allowed to have a value of 0 (unknown)."),
                ifd0Id, dngTags, unsignedShort, 1, printValue), // DNG tag
        TagInfo(0xc65c, "BestQualityScale", N_("Best Quality Scale"),
                N_("For some cameras, the best possible image quality is not achieved "
                   "by preserving the total pixel count during conversion. For example, "
                   "Fujifilm SuperCCD images have maximum detail when their total pixel "
                   "count is doubled. This tag specifies the amount by which the values "
                   "of the DefaultScale tag need to be multiplied to achieve the best "
                   "quality image size."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc65d, "RawDataUniqueID", N_("Raw Data Unique ID"),
                N_("This tag contains a 16-byte unique identifier for the raw image data "
                   "in the DNG file. DNG readers can use this tag to recognize a "
                   "particular raw image, even if the file's name or the metadata "
                   "contained in the file has been changed. If a DNG writer creates such "
                   "an identifier, it should do so using an algorithm that will ensure "
                   "that it is very unlikely two different images will end up having the "
                   "same identifier."),
                ifd0Id, dngTags, unsignedByte, 16, printValue), // DNG tag
        TagInfo(0xc68b, "OriginalRawFileName", N_("Original Raw File Name"),
                N_("If the DNG file was converted from a non-DNG raw file, then this tag "
                   "contains the file name of that original raw file."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc68c, "OriginalRawFileData", N_("Original Raw File Data"),
                N_("If the DNG file was converted from a non-DNG raw file, then this tag "
                   "contains the compressed contents of that original raw file. The "
                   "contents of this tag always use the big-endian byte order. The tag "
                   "contains a sequence of data blocks. Future versions of the DNG "
                   "specification may define additional data blocks, so DNG readers "
                   "should ignore extra bytes when parsing this tag. DNG readers should "
                   "also detect the case where data blocks are missing from the end of "
                   "the sequence, and should assume a default value for all the missing "
                   "blocks. There are no padding or alignment bytes between data blocks."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc68d, "ActiveArea", N_("Active Area"),
                N_("This rectangle defines the active (non-masked) pixels of the sensor. "
                   "The order of the rectangle coordinates is: top, left, bottom, right."),
                ifd0Id, dngTags, unsignedShort, 4, printValue), // DNG tag
        TagInfo(0xc68e, "MaskedAreas", N_("Masked Areas"),
                N_("This tag contains a list of non-overlapping rectangle coordinates of "
                   "fully masked pixels, which can be optionally used by DNG readers "
                   "to measure the black encoding level. The order of each rectangle's "
                   "coordinates is: top, left, bottom, right. If the raw image data has "
                   "already had its black encoding level subtracted, then this tag should "
                   "not be used, since the masked pixels are no longer useful."),
                ifd0Id, dngTags, unsignedShort, -1, printValue), // DNG tag
        TagInfo(0xc68f, "AsShotICCProfile", N_("As-Shot ICC Profile"),
                N_("This tag contains an ICC profile that, in conjunction with the "
                   "AsShotPreProfileMatrix tag, provides the camera manufacturer with a "
                   "way to specify a default color rendering from camera color space "
                   "coordinates (linear reference values) into the ICC profile connection "
                   "space. The ICC profile connection space is an output referred "
                   "colorimetric space, whereas the other color calibration tags in DNG "
                   "specify a conversion into a scene referred colorimetric space. This "
                   "means that the rendering in this profile should include any desired "
                   "tone and gamut mapping needed to convert between scene referred "
                   "values and output referred values."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc690, "AsShotPreProfileMatrix", N_("As-Shot Pre-Profile Matrix"),
                N_("This tag is used in conjunction with the AsShotICCProfile tag. It "
                   "specifies a matrix that should be applied to the camera color space "
                   "coordinates before processing the values through the ICC profile "
                   "specified in the AsShotICCProfile tag. The matrix is stored in the "
                   "row scan order. If ColorPlanes is greater than three, then this "
                   "matrix can (but is not required to) reduce the dimensionality of the "
                   "color data down to three components, in which case the AsShotICCProfile "
                   "should have three rather than ColorPlanes input components."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc691, "CurrentICCProfile", N_("Current ICC Profile"),
                N_("This tag is used in conjunction with the CurrentPreProfileMatrix tag. "
                   "The CurrentICCProfile and CurrentPreProfileMatrix tags have the same "
                   "purpose and usage as the AsShotICCProfile and AsShotPreProfileMatrix "
                   "tag pair, except they are for use by raw file editors rather than "
                   "camera manufacturers."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc692, "CurrentPreProfileMatrix", N_("Current Pre-Profile Matrix"),
                N_("This tag is used in conjunction with the CurrentICCProfile tag. "
                   "The CurrentICCProfile and CurrentPreProfileMatrix tags have the same "
                   "purpose and usage as the AsShotICCProfile and AsShotPreProfileMatrix "
                   "tag pair, except they are for use by raw file editors rather than "
                   "camera manufacturers."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc6bf, "ColorimetricReference", N_("Colorimetric Reference"),
                N_("The DNG color model documents a transform between camera colors and "
                "CIE XYZ values. This tag describes the colorimetric reference for the "
                "CIE XYZ values. 0 = The XYZ values are scene-referred. 1 = The XYZ values "
                "are output-referred, using the ICC profile perceptual dynamic range. This "
                "tag allows output-referred data to be stored in DNG files and still processed "
                "correctly by DNG readers."),
                ifd0Id, dngTags, unsignedShort, 0, printValue), // DNG tag
        TagInfo(0xc6f3, "CameraCalibrationSignature", N_("Camera Calibration Signature"),
                N_("A UTF-8 encoded string associated with the CameraCalibration1 and "
                "CameraCalibration2 tags. The CameraCalibration1 and CameraCalibration2 tags "
                "should only be used in the DNG color transform if the string stored in the "
                "CameraCalibrationSignature tag exactly matches the string stored in the "
                "ProfileCalibrationSignature tag for the selected camera profile."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc6f4, "ProfileCalibrationSignature", N_("Profile Calibration Signature"),
                N_("A UTF-8 encoded string associated with the camera profile tags. The "
                "CameraCalibration1 and CameraCalibration2 tags should only be used in the "
                "DNG color transfer if the string stored in the CameraCalibrationSignature "
                "tag exactly matches the string stored in the ProfileCalibrationSignature tag "
                "for the selected camera profile."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc6f6, "AsShotProfileName", N_("As Shot Profile Name"),
                N_("A UTF-8 encoded string containing the name of the \"as shot\" camera "
                "profile, if any."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc6f7, "NoiseReductionApplied", N_("Noise Reduction Applied"),
                N_("This tag indicates how much noise reduction has been applied to the raw "
                "data on a scale of 0.0 to 1.0. A 0.0 value indicates that no noise reduction "
                "has been applied. A 1.0 value indicates that the \"ideal\" amount of noise "
                "reduction has been applied, i.e. that the DNG reader should not apply "
                "additional noise reduction by default. A value of 0/0 indicates that this "
                "parameter is unknown."),
                ifd0Id, dngTags, unsignedRational, 1, printValue), // DNG tag
        TagInfo(0xc6f8, "ProfileName", N_("Profile Name"),
                N_("A UTF-8 encoded string containing the name of the camera profile. This "
                "tag is optional if there is only a single camera profile stored in the file "
                "but is required for all camera profiles if there is more than one camera "
                "profile stored in the file."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc6f9, "ProfileHueSatMapDims", N_("Profile Hue Sat Map Dims"),
                N_("This tag specifies the number of input samples in each dimension of the "
                "hue/saturation/value mapping tables. The data for these tables are stored "
                "in ProfileHueSatMapData1 and ProfileHueSatMapData2 tags. The most common "
                "case has ValueDivisions equal to 1, so only hue and saturation are used as "
                "inputs to the mapping table."),
                ifd0Id, dngTags, unsignedLong, 3, printValue), // DNG tag
        TagInfo(0xc6fa, "ProfileHueSatMapData1", N_("Profile Hue Sat Map Data 1"),
                N_("This tag contains the data for the first hue/saturation/value mapping "
                "table. Each entry of the table contains three 32-bit IEEE floating-point "
                "values. The first entry is hue shift in degrees; the second entry is "
                "saturation scale factor; and the third entry is a value scale factor. The "
                "table entries are stored in the tag in nested loop order, with the value "
                "divisions in the outer loop, the hue divisions in the middle loop, and the "
                "saturation divisions in the inner loop. All zero input saturation entries "
                "are required to have a value scale factor of 1.0."),
                ifd0Id, dngTags, tiffFloat, 0, printValue), // DNG tag
        TagInfo(0xc6fb, "ProfileHueSatMapData2", N_("Profile Hue Sat Map Data 2"),
                N_("This tag contains the data for the second hue/saturation/value mapping "
                "table. Each entry of the table contains three 32-bit IEEE floating-point "
                "values. The first entry is hue shift in degrees; the second entry is a "
                "saturation scale factor; and the third entry is a value scale factor. The "
                "table entries are stored in the tag in nested loop order, with the value "
                "divisions in the outer loop, the hue divisions in the middle loop, and the "
                "saturation divisions in the inner loop. All zero input saturation entries "
                "are required to have a value scale factor of 1.0."),
                ifd0Id, dngTags, tiffFloat, 0, printValue), // DNG tag
        TagInfo(0xc6fc, "ProfileToneCurve", N_("Profile Tone Curve"),
                N_("This tag contains a default tone curve that can be applied while "
                "processing the image as a starting point for user adjustments. The curve "
                "is specified as a list of 32-bit IEEE floating-point value pairs in linear "
                "gamma. Each sample has an input value in the range of 0.0 to 1.0, and an "
                "output value in the range of 0.0 to 1.0. The first sample is required to be "
                "(0.0, 0.0), and the last sample is required to be (1.0, 1.0). Interpolated "
                "the curve using a cubic spline."),
                ifd0Id, dngTags, tiffFloat, -1, printValue), // DNG tag
        TagInfo(0xc6fd, "ProfileEmbedPolicy", N_("Profile Embed Policy"),
                N_("This tag contains information about the usage rules for the associated "
                "camera profile."),
                ifd0Id, dngTags, unsignedLong, 1, printValue), // DNG tag
        TagInfo(0xc6fe, "ProfileCopyright", N_("Profile Copyright"),
                N_("A UTF-8 encoded string containing the copyright information for the "
                "camera profile. This string always should be preserved along with the other "
                "camera profile tags."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc714, "ForwardMatrix1", N_("Forward Matrix 1"),
                N_("This tag defines a matrix that maps white balanced camera colors to XYZ "
                "D50 colors."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc715, "ForwardMatrix2", N_("Forward Matrix 2"),
                N_("This tag defines a matrix that maps white balanced camera colors to XYZ "
                "D50 colors."),
                ifd0Id, dngTags, signedRational, -1, printValue), // DNG tag
        TagInfo(0xc716, "PreviewApplicationName", N_("Preview Application Name"),
                N_("A UTF-8 encoded string containing the name of the application that "
                "created the preview stored in the IFD."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc717, "PreviewApplicationVersion", N_("Preview Application Version"),
                N_("A UTF-8 encoded string containing the version number of the application "
                "that created the preview stored in the IFD."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc718, "PreviewSettingsName", N_("Preview Settings Name"),
                N_("A UTF-8 encoded string containing the name of the conversion settings "
                "(for example, snapshot name) used for the preview stored in the IFD."),
                ifd0Id, dngTags, unsignedByte, 0, printValue), // DNG tag
        TagInfo(0xc719, "PreviewSettingsDigest", N_("Preview Settings Digest"),
                N_("A unique ID of the conversion settings (for example, MD5 digest) used "
                "to render the preview stored in the IFD."),
                ifd0Id, dngTags, unsignedByte, 16, printValue), // DNG tag
        TagInfo(0xc71a, "PreviewColorSpace", N_("Preview Color Space"),
                N_("This tag specifies the color space in which the rendered preview in this "
                "IFD is stored. The default value for this tag is sRGB for color previews "
                "and Gray Gamma 2.2 for monochrome previews."),
                ifd0Id, dngTags, unsignedLong, 1, printValue), // DNG tag
        TagInfo(0xc71b, "PreviewDateTime", N_("Preview Date Time"),
                N_("This tag is an ASCII string containing the name of the date/time at which "
                "the preview stored in the IFD was rendered. The date/time is encoded using "
                "ISO 8601 format."),
                ifd0Id, dngTags, asciiString, 0, printValue), // DNG tag
        TagInfo(0xc71c, "RawImageDigest", N_("Raw Image Digest"),
                N_("This tag is an MD5 digest of the raw image data. All pixels in the image "
                "are processed in row-scan order. Each pixel is zero padded to 16 or 32 bits "
                "deep (16-bit for data less than or equal to 16 bits deep, 32-bit otherwise). "
                "The data for each pixel is processed in little-endian byte order."),
                ifd0Id, dngTags, undefined, 16, printValue), // DNG tag
        TagInfo(0xc71d, "OriginalRawFileDigest", N_("Original Raw File Digest"),
                N_("This tag is an MD5 digest of the data stored in the OriginalRawFileData "
                "tag."),
                ifd0Id, dngTags, undefined, 16, printValue), // DNG tag
        TagInfo(0xc71e, "SubTileBlockSize", N_("Sub Tile Block Size"),
                N_("Normally, the pixels within a tile are stored in simple row-scan order. "
                "This tag specifies that the pixels within a tile should be grouped first "
                "into rectangular blocks of the specified size. These blocks are stored in "
                "row-scan order. Within each block, the pixels are stored in row-scan order. "
                "The use of a non-default value for this tag requires setting the "
                "DNGBackwardVersion tag to at least 1.2.0.0."),
                ifd0Id, dngTags, unsignedLong, 2, printValue), // DNG tag
        TagInfo(0xc71f, "RowInterleaveFactor", N_("Row Interleave Factor"),
                N_("This tag specifies that rows of the image are stored in interleaved "
                "order. The value of the tag specifies the number of interleaved fields. "
                "The use of a non-default value for this tag requires setting the "
                "DNGBackwardVersion tag to at least 1.2.0.0."),
                ifd0Id, dngTags, unsignedLong, 1, printValue), // DNG tag
        TagInfo(0xc725, "ProfileLookTableDims", N_("Profile Look Table Dims"),
                N_("This tag specifies the number of input samples in each dimension of a "
                "default \"look\" table. The data for this table is stored in the "
                "ProfileLookTableData tag."),
                ifd0Id, dngTags, unsignedLong, 3, printValue), // DNG tag
        TagInfo(0xc726, "ProfileLookTableData", N_("Profile Look Table Data"),
                N_("This tag contains a default \"look\" table that can be applied while "
                "processing the image as a starting point for user adjustment. This table "
                "uses the same format as the tables stored in the ProfileHueSatMapData1 "
                "and ProfileHueSatMapData2 tags, and is applied in the same color space. "
                "However, it should be applied later in the processing pipe, after any "
                "exposure compensation and/or fill light stages, but before any tone curve "
                "stage. Each entry of the table contains three 32-bit IEEE floating-point "
                "values. The first entry is hue shift in degrees, the second entry is a "
                "saturation scale factor, and the third entry is a value scale factor. "
                "The table entries are stored in the tag in nested loop order, with the "
                "value divisions in the outer loop, the hue divisions in the middle loop, "
                "and the saturation divisions in the inner loop. All zero input saturation "
                "entries are required to have a value scale factor of 1.0."),
                ifd0Id, dngTags, tiffFloat, -1, printValue), // DNG tag
        TagInfo(0xc740, "OpcodeList1", N_("Opcode List 1"),
                N_("Specifies the list of opcodes that should be applied to the raw image, "
                "as read directly from the file."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc741, "OpcodeList2", N_("Opcode List 2"),
                N_("Specifies the list of opcodes that should be applied to the raw image, "
                "just after it has been mapped to linear reference values."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc74e, "OpcodeList3", N_("Opcode List 3"),
                N_("Specifies the list of opcodes that should be applied to the raw image, "
                "just after it has been demosaiced."),
                ifd0Id, dngTags, undefined, -1, printValue), // DNG tag
        TagInfo(0xc761, "NoiseProfile", N_("Noise Profile"),
                N_("NoiseProfile describes the amount of noise in a raw image. Specifically, "
                "this tag models the amount of signal-dependent photon (shot) noise and "
                "signal-independent sensor readout noise, two common sources of noise in "
                "raw images. The model assumes that the noise is white and spatially "
                "independent, ignoring fixed pattern effects and other sources of noise (e.g., "
                "pixel response non-uniformity, spatially-dependent thermal effects, etc.)."),
                ifd0Id, dngTags, tiffDouble, -1, printValue), // DNG tag
        // End of list marker
        TagInfo(0xffff, "(UnknownIfdTag)", N_("Unknown IFD tag"),
                N_("Unknown IFD tag"),
                ifd0Id, sectionIdNotSet, asciiString, -1, printValue)
    };

    const TagInfo* ifdTagList()
    {
        return ifdTagInfo;
    }

    //! ExposureProgram, tag 0x8822
    extern const TagDetails exifExposureProgram[] = {
        { 0, N_("Not defined")       },
        { 1, N_("Manual")            },
        { 2, N_("Auto")              },
        { 3, N_("Aperture priority") },
        { 4, N_("Shutter priority")  },
        { 5, N_("Creative program")  },
        { 6, N_("Action program")    },
        { 7, N_("Portrait mode")     },
        { 8, N_("Landscape mode")    }
    };

    //! MeteringMode, tag 0x9207
    extern const TagDetails exifMeteringMode[] = {
        { 0,   N_("Unknown")                 },
        { 1,   N_("Average")                 },
        { 2,   N_("Center weighted average") },
        { 3,   N_("Spot")                    },
        { 4,   N_("Multi-spot")              },
        { 5,   N_("Multi-segment")           },
        { 6,   N_("Partial")                 },
        { 255, N_("Other")                   },
        { 255, N_("Other")                   }  // To silence compiler warning
    };

    //! LightSource, tag 0x9208
    extern const TagDetails exifLightSource[] = {
        {   0, N_("Unknown")                                 },
        {   1, N_("Daylight")                                },
        {   2, N_("Fluorescent")                             },
        {   3, N_("Tungsten (incandescent light)")           },
        {   4, N_("Flash")                                   },
        {   9, N_("Fine weather")                            },
        {  10, N_("Cloudy weather")                          },
        {  11, N_("Shade")                                   },
        {  12, N_("Daylight fluorescent (D 5700 - 7100K)")   },
        {  13, N_("Day white fluorescent (N 4600 - 5400K)")  },
        {  14, N_("Cool white fluorescent (W 3900 - 4500K)") },
        {  15, N_("White fluorescent (WW 3200 - 3700K)")     },
        {  17, N_("Standard light A")                        },
        {  18, N_("Standard light B")                        },
        {  19, N_("Standard light C")                        },
        {  20, N_("D55")                                     },
        {  21, N_("D65")                                     },
        {  22, N_("D75")                                     },
        {  23, N_("D50")                                     },
        {  24, N_("ISO studio tungsten")                     },
        { 255, N_("Other light source")                      }
    };

    //! ColorSpace, tag 0xa001
    extern const TagDetails exifColorSpace[] = {
        {      1, N_("sRGB")         },
        {      2, N_("Adobe RGB")    },    // Not defined to Exif 2.2 spec. But used by a lot of cameras.
        { 0xffff, N_("Uncalibrated") }
    };

    //! SensingMethod, tag 0xa217
    extern const TagDetails exifSensingMethod[] = {
        { 1, N_("Not defined")             },
        { 2, N_("One-chip color area")     },
        { 3, N_("Two-chip color area")     },
        { 4, N_("Three-chip color area")   },
        { 5, N_("Color sequential area")   },
        { 7, N_("Trilinear sensor")        },
        { 8, N_("Color sequential linear") }
    };

    //! FileSource, tag 0xa300
    extern const TagDetails exifFileSource[] = {
        { 1, N_("Film scanner")            },	// Not defined to Exif 2.2 spec.
        { 2, N_("Reflexion print scanner") },	// but used by some scanner device softwares.
        { 3, N_("Digital still camera")    }
    };

    //! SceneType, tag 0xa301
    extern const TagDetails exifSceneType[] = {
        { 1, N_("Directly photographed") }
    };

    //! CustomRendered, tag 0xa401
    extern const TagDetails exifCustomRendered[] = {
        { 0, N_("Normal process") },
        { 1, N_("Custom process") }
    };

    //! ExposureMode, tag 0xa402
    extern const TagDetails exifExposureMode[] = {
        { 0, N_("Auto")         },
        { 1, N_("Manual")       },
        { 2, N_("Auto bracket") }
    };

    //! WhiteBalance, tag 0xa403
    extern const TagDetails exifWhiteBalance[] = {
        { 0, N_("Auto")   },
        { 1, N_("Manual") }
    };

    //! SceneCaptureType, tag 0xa406
    extern const TagDetails exifSceneCaptureType[] = {
        { 0, N_("Standard")    },
        { 1, N_("Landscape")   },
        { 2, N_("Portrait")    },
        { 3, N_("Night scene") },
        { 3, N_("Night scene") }                // To silence compiler warning
    };

    //! GainControl, tag 0xa407
    extern const TagDetails exifGainControl[] = {
        { 0, N_("None")           },
        { 1, N_("Low gain up")    },
        { 2, N_("High gain up")   },
        { 3, N_("Low gain down")  },
        { 4, N_("High gain down") }
    };

    //! Contrast, tag 0xa408 and Sharpness, tag 0xa40a
    extern const TagDetails exifNormalSoftHard[] = {
        { 0, N_("Normal") },
        { 1, N_("Soft")   },
        { 2, N_("Hard")   }
    };

    //! Saturation, tag 0xa409
    extern const TagDetails exifSaturation[] = {
        { 0, N_("Normal") },
        { 1, N_("Low")    },
        { 2, N_("High")   }
    };

    //! SubjectDistanceRange, tag 0xa40c
    extern const TagDetails exifSubjectDistanceRange[] = {
        { 0, N_("Unknown")      },
        { 1, N_("Macro")        },
        { 2, N_("Close view")   },
        { 3, N_("Distant view") },
        { 3, N_("Distant view") }               // To silence compiler warning
    };

    // Exif IFD Tags
    static const TagInfo exifTagInfo[] = {
        TagInfo(0x829a, "ExposureTime", N_("Exposure Time"),
                N_("Exposure time, given in seconds (sec)."),
                exifId, captureCond, unsignedRational, 1, print0x829a),
        TagInfo(0x829d, "FNumber", N_("FNumber"),
                N_("The F number."),
                exifId, captureCond, unsignedRational, 1, print0x829d),
        TagInfo(0x8822, "ExposureProgram", N_("Exposure Program"),
                N_("The class of the program used by the camera to set exposure "
                "when the picture is taken."),
                exifId, captureCond, unsignedShort, 1, print0x8822),
        TagInfo(0x8824, "SpectralSensitivity", N_("Spectral Sensitivity"),
                N_("Indicates the spectral sensitivity of each channel of the "
                "camera used. The tag value is an ASCII string compatible "
                "with the standard developed by the ASTM Technical Committee."),
                exifId, captureCond, asciiString, 0, printValue),
        TagInfo(0x8827, "ISOSpeedRatings", N_("ISO Speed Ratings"),
                N_("Indicates the ISO Speed and ISO Latitude of the camera or "
                "input device as specified in ISO 12232."),
                exifId, captureCond, unsignedShort, 0, print0x8827),
        TagInfo(0x8828, "OECF", N_("Opto-Electoric Conversion Function"),
                N_("Indicates the Opto-Electoric Conversion Function (OECF) "
                "specified in ISO 14524. <OECF> is the relationship between "
                "the camera optical input and the image values."),
                exifId, captureCond, undefined, 0, printValue),
        TagInfo(0x8830, "SensitivityType", N_("Sensitivity Type"),
                N_("The SensitivityType tag indicates PhotographicSensitivity tag. which "
                "one of the parameters of ISO12232 is the Although it is an optional tag, "
                "it should be recorded when a PhotographicSensitivity tag is recorded. "
                "Value = 4, 5, 6, or 7 may be used in case that the values of plural "
                "parameters are the same."),
                exifId, captureCond, unsignedShort, 1, printValue),
        TagInfo(0x8831, "StandardOutputSensitivity", N_("Standard Output Sensitivity"),
                N_("This tag indicates the standard output sensitivity value of a camera or "
                "input device defined in ISO 12232. When recording this tag, the "
                "PhotographicSensitivity and SensitivityType tags shall also be recorded."),
                exifId, captureCond, unsignedLong, 1, printValue),
        TagInfo(0x8832, "RecommendedExposureIndex", N_("Recommended Exposure Index"),
                N_("This tag indicates the recommended exposure index value of a camera or "
                "input device defined in ISO 12232. When recording this tag, the "
                "PhotographicSensitivity and SensitivityType tags shall also be recorded."),
                exifId, captureCond, unsignedLong, 1, printValue),
        TagInfo(0x8833, "ISOSpeed", N_("ISO Speed"),
                N_("This tag indicates the ISO speed value of a camera or input device that "
                "is defined in ISO 12232. When recording this tag, the PhotographicSensitivity "
                "and SensitivityType tags shall also be recorded."),
                exifId, captureCond, unsignedLong, 1, printValue),
        TagInfo(0x8834, "ISOSpeedLatitudeyyy", N_("ISO Speed Latitude yyy"),
                N_("This tag indicates the ISO speed latitude yyy value of a camera or input "
                "device that is defined in ISO 12232. However, this tag shall not be recorded "
                "without ISOSpeed and ISOSpeedLatitudezzz."),
                exifId, captureCond, unsignedLong, 1, printValue),
        TagInfo(0x8835, "ISOSpeedLatitudezzz", N_("ISO Speed Latitude zzz"),
                N_("This tag indicates the ISO speed latitude zzz value of a camera or input "
                "device that is defined in ISO 12232. However, this tag shall not be recorded "
                "without ISOSpeed and ISOSpeedLatitudeyyy."),
                exifId, captureCond, unsignedLong, 1, printValue),
        TagInfo(0x9000, "ExifVersion", N_("Exif Version"),
                N_("The version of this standard supported. Nonexistence of this "
                "field is taken to mean nonconformance to the standard."),
                exifId, exifVersion, undefined, 4, printExifVersion),
        TagInfo(0x9003, "DateTimeOriginal", N_("Date and Time (original)"),
                N_("The date and time when the original image data was generated. "
                "For a digital still camera the date and time the picture was taken are recorded."),
                exifId, dateTime, asciiString, 20, printValue),
        TagInfo(0x9004, "DateTimeDigitized", N_("Date and Time (digitized)"),
                N_("The date and time when the image was stored as digital data."),
                exifId, dateTime, asciiString, 20, printValue),
        TagInfo(0x9101, "ComponentsConfiguration", N_("Components Configuration"),
                N_("Information specific to compressed data. The channels of "
                "each component are arranged in order from the 1st "
                "component to the 4th. For uncompressed data the data "
                "arrangement is given in the <PhotometricInterpretation> tag. "
                "However, since <PhotometricInterpretation> can only "
                "express the order of Y, Cb and Cr, this tag is provided "
                "for cases when compressed data uses components other than "
                "Y, Cb, and Cr and to enable support of other sequences."),
                exifId, imgConfig, undefined, 4, print0x9101),
        TagInfo(0x9102, "CompressedBitsPerPixel", N_("Compressed Bits per Pixel"),
                N_("Information specific to compressed data. The compression mode "
                "used for a compressed image is indicated in unit bits per pixel."),
                exifId, imgConfig, unsignedRational, 1, printFloat),
        TagInfo(0x9201, "ShutterSpeedValue", N_("Shutter speed"),
                N_("Shutter speed. The unit is the APEX (Additive System of "
                "Photographic Exposure) setting."),
                exifId, captureCond, signedRational, 1, print0x9201),
        TagInfo(0x9202, "ApertureValue", N_("Aperture"),
                N_("The lens aperture. The unit is the APEX value."),
                exifId, captureCond, unsignedRational, 1, print0x9202),
        TagInfo(0x9203, "BrightnessValue", N_("Brightness"),
                N_("The value of brightness. The unit is the APEX value. "
                "Ordinarily it is given in the range of -99.99 to 99.99."),
                exifId, captureCond, signedRational, 1, printFloat),
        TagInfo(0x9204, "ExposureBiasValue", N_("Exposure Bias"),
                N_("The exposure bias. The units is the APEX value. Ordinarily "
                "it is given in the range of -99.99 to 99.99."),
                exifId, captureCond, signedRational, 1, print0x9204),
        TagInfo(0x9205, "MaxApertureValue", N_("Max Aperture Value"),
                N_("The smallest F number of the lens. The unit is the APEX value. "
                "Ordinarily it is given in the range of 00.00 to 99.99, "
                "but it is not limited to this range."),
                exifId, captureCond, unsignedRational, 1, print0x9202),
        TagInfo(0x9206, "SubjectDistance", N_("Subject Distance"),
                N_("The distance to the subject, given in meters."),
                exifId, captureCond, unsignedRational, 1, print0x9206),
        TagInfo(0x9207, "MeteringMode", N_("Metering Mode"),
                N_("The metering mode."),
                exifId, captureCond, unsignedShort, 1, print0x9207),
        TagInfo(0x9208, "LightSource", N_("Light Source"),
                N_("The kind of light source."),
                exifId, captureCond, unsignedShort, 1, print0x9208),
        TagInfo(0x9209, "Flash", N_("Flash"),
                N_("This tag is recorded when an image is taken using a strobe light (flash)."),
                exifId, captureCond, unsignedShort, 1, EXV_PRINT_TAG(exifFlash)),
        TagInfo(0x920a, "FocalLength", N_("Focal Length"),
                N_("The actual focal length of the lens, in mm. Conversion is not "
                "made to the focal length of a 35 mm film camera."),
                exifId, captureCond, unsignedRational, 1, print0x920a),
        TagInfo(0x9214, "SubjectArea", N_("Subject Area"),
                N_("This tag indicates the location and area of the main subject "
                "in the overall scene."),
                exifId, captureCond, unsignedShort, -1, printValue),
        TagInfo(0x927c, "MakerNote", N_("Maker Note"),
                N_("A tag for manufacturers of Exif writers to record any desired "
                "information. The contents are up to the manufacturer."),
                exifId, userInfo, undefined, 0, printValue),
        TagInfo(0x9286, "UserComment", N_("User Comment"),
                N_("A tag for Exif users to write keywords or comments on the image "
                "besides those in <ImageDescription>, and without the "
                "character code limitations of the <ImageDescription> tag."),
                exifId, userInfo, comment, 0, print0x9286),
        TagInfo(0x9290, "SubSecTime", N_("Sub-seconds Time"),
                N_("A tag used to record fractions of seconds for the <DateTime> tag."),
                exifId, dateTime, asciiString, 0, printValue),
        TagInfo(0x9291, "SubSecTimeOriginal", N_("Sub-seconds Time Original"),
                N_("A tag used to record fractions of seconds for the <DateTimeOriginal> tag."),
                exifId, dateTime, asciiString, 0, printValue),
        TagInfo(0x9292, "SubSecTimeDigitized", N_("Sub-seconds Time Digitized"),
                N_("A tag used to record fractions of seconds for the <DateTimeDigitized> tag."),
                exifId, dateTime, asciiString, 0, printValue),
        TagInfo(0xa000, "FlashpixVersion", N_("FlashPix Version"),
                N_("The FlashPix format version supported by a FPXR file."),
                exifId, exifVersion, undefined, 4, printExifVersion),
        TagInfo(0xa001, "ColorSpace", N_("Color Space"),
                N_("The color space information tag is always "
                "recorded as the color space specifier. Normally sRGB "
                "is used to define the color space based on the PC monitor "
                "conditions and environment. If a color space other than "
                "sRGB is used, Uncalibrated is set. Image data "
                "recorded as Uncalibrated can be treated as sRGB when it is "
                "converted to FlashPix."),
                exifId, imgCharacter, unsignedShort, 1, print0xa001),
        TagInfo(0xa002, "PixelXDimension", N_("Pixel X Dimension"),
                N_("Information specific to compressed data. When a "
                "compressed file is recorded, the valid width of the "
                "meaningful image must be recorded in this tag, whether or "
                "not there is padding data or a restart marker. This tag "
                "should not exist in an uncompressed file."),
                exifId, imgConfig, unsignedLong, 1, printValue),
        TagInfo(0xa003, "PixelYDimension", N_("Pixel Y Dimension"),
                N_("Information specific to compressed data. When a compressed "
                "file is recorded, the valid height of the meaningful image "
                "must be recorded in this tag, whether or not there is padding "
                "data or a restart marker. This tag should not exist in an "
                "uncompressed file. Since data padding is unnecessary in the vertical "
                "direction, the number of lines recorded in this valid image height tag "
                "will in fact be the same as that recorded in the SOF."),
                exifId, imgConfig, unsignedLong, 1, printValue),
        TagInfo(0xa004, "RelatedSoundFile", N_("Related Sound File"),
                N_("This tag is used to record the name of an audio file related "
                "to the image data. The only relational information "
                "recorded here is the Exif audio file name and extension (an "
                "ASCII string consisting of 8 characters + '.' + 3 "
                "characters). The path is not recorded."),
                exifId, relatedFile, asciiString, 13, printValue),
        TagInfo(0xa005, "InteroperabilityTag", N_("Interoperability IFD Pointer"),
                N_("Interoperability IFD is composed of tags which stores the "
                "information to ensure the Interoperability and pointed "
                "by the following tag located in Exif IFD. "
                "The Interoperability structure of Interoperability IFD is "
                "the same as TIFF defined IFD structure but does not contain the "
                "image data characteristically compared with normal TIFF IFD."),
                exifId, exifFormat, unsignedLong, 1, printValue),
        TagInfo(0xa20b, "FlashEnergy", N_("Flash Energy"),
                N_("Indicates the strobe energy at the time the image is "
                "captured, as measured in Beam Candle Power Seconds (BCPS)."),
                exifId, captureCond, unsignedRational, 1, printValue),
        TagInfo(0xa20c, "SpatialFrequencyResponse", N_("Spatial Frequency Response"),
                N_("This tag records the camera or input device spatial frequency "
                "table and SFR values in the direction of image width, "
                "image height, and diagonal direction, as specified in ISO 12233."),
                exifId, captureCond, undefined, 0, printValue),
        TagInfo(0xa20e, "FocalPlaneXResolution", N_("Focal Plane X-Resolution"),
                N_("Indicates the number of pixels in the image width (X) direction "
                "per <FocalPlaneResolutionUnit> on the camera focal plane."),
                exifId, captureCond, unsignedRational, 1, printFloat),
        TagInfo(0xa20f, "FocalPlaneYResolution", N_("Focal Plane Y-Resolution"),
                N_("Indicates the number of pixels in the image height (V) direction "
                "per <FocalPlaneResolutionUnit> on the camera focal plane."),
                exifId, captureCond, unsignedRational, 1, printFloat),
        TagInfo(0xa210, "FocalPlaneResolutionUnit", N_("Focal Plane Resolution Unit"),
                N_("Indicates the unit for measuring <FocalPlaneXResolution> and "
                "<FocalPlaneYResolution>. This value is the same as the <ResolutionUnit>."),
                exifId, captureCond, unsignedShort, 1, printExifUnit),
        TagInfo(0xa214, "SubjectLocation", N_("Subject Location"),
                N_("Indicates the location of the main subject in the scene. The "
                "value of this tag represents the pixel at the center of the "
                "main subject relative to the left edge, prior to rotation "
                "processing as per the <Rotation> tag. The first value "
                "indicates the X column number and second indicates the Y row number."),
                exifId, captureCond, unsignedShort, 2, printValue),
        TagInfo(0xa215, "ExposureIndex", N_("Exposure index"),
                N_("Indicates the exposure index selected on the camera or "
                "input device at the time the image is captured."),
                exifId, captureCond, unsignedRational, 1, printValue),
        TagInfo(0xa217, "SensingMethod", N_("Sensing Method"),
                N_("Indicates the image sensor type on the camera or input device."),
                exifId, captureCond, unsignedShort, 1, print0xa217),
        TagInfo(0xa300, "FileSource", N_("File Source"),
                N_("Indicates the image source. If a DSC recorded the image, "
                "this tag value of this tag always be set to 3, indicating "
                "that the image was recorded on a DSC."),
                exifId, captureCond, undefined, 1, print0xa300),
        TagInfo(0xa301, "SceneType", N_("Scene Type"),
                N_("Indicates the type of scene. If a DSC recorded the image, "
                "this tag value must always be set to 1, indicating that the "
                "image was directly photographed."),
                exifId, captureCond, undefined, 1, print0xa301),
        TagInfo(0xa302, "CFAPattern", N_("Color Filter Array Pattern"),
                N_("Indicates the color filter array (CFA) geometric pattern of the "
                "image sensor when a one-chip color area sensor is used. "
                "It does not apply to all sensing methods."),
                exifId, captureCond, undefined, 0, printValue),
        TagInfo(0xa401, "CustomRendered", N_("Custom Rendered"),
                N_("This tag indicates the use of special processing on image "
                "data, such as rendering geared to output. When special "
                "processing is performed, the reader is expected to disable "
                "or minimize any further processing."),
                exifId, captureCond, unsignedShort, 1, print0xa401),
        TagInfo(0xa402, "ExposureMode", N_("Exposure Mode"),
                N_("This tag indicates the exposure mode set when the image was "
                "shot. In auto-bracketing mode, the camera shoots a series of "
                "frames of the same scene at different exposure settings."),
                exifId, captureCond, unsignedShort, 1, print0xa402),
        TagInfo(0xa403, "WhiteBalance", N_("White Balance"),
                N_("This tag indicates the white balance mode set when the image was shot."),
                exifId, captureCond, unsignedShort, 1, print0xa403),
        TagInfo(0xa404, "DigitalZoomRatio", N_("Digital Zoom Ratio"),
                N_("This tag indicates the digital zoom ratio when the image was "
                "shot. If the numerator of the recorded value is 0, this "
                "indicates that digital zoom was not used."),
                exifId, captureCond, unsignedRational, 1, print0xa404),
        TagInfo(0xa405, "FocalLengthIn35mmFilm", N_("Focal Length In 35mm Film"),
                N_("This tag indicates the equivalent focal length assuming a "
                "35mm film camera, in mm. A value of 0 means the focal "
                "length is unknown. Note that this tag differs from the "
                "<FocalLength> tag."),
                exifId, captureCond, unsignedShort, 1, print0xa405),
        TagInfo(0xa406, "SceneCaptureType", N_("Scene Capture Type"),
                N_("This tag indicates the type of scene that was shot. It can "
                "also be used to record the mode in which the image was "
                "shot. Note that this differs from the <SceneType> tag."),
                exifId, captureCond, unsignedShort, 1, print0xa406),
        TagInfo(0xa407, "GainControl", N_("Gain Control"),
                N_("This tag indicates the degree of overall image gain adjustment."),
                exifId, captureCond, unsignedShort, 1, print0xa407),
        TagInfo(0xa408, "Contrast", N_("Contrast"),
                N_("This tag indicates the direction of contrast processing "
                "applied by the camera when the image was shot."),
                exifId, captureCond, unsignedShort, 1, printNormalSoftHard),
        TagInfo(0xa409, "Saturation", N_("Saturation"),
                N_("This tag indicates the direction of saturation processing "
                "applied by the camera when the image was shot."),
                exifId, captureCond, unsignedShort, 1, print0xa409),
        TagInfo(0xa40a, "Sharpness", N_("Sharpness"),
                N_("This tag indicates the direction of sharpness processing "
                "applied by the camera when the image was shot."),
                exifId, captureCond, unsignedShort, 1, printNormalSoftHard),
        TagInfo(0xa40b, "DeviceSettingDescription", N_("Device Setting Description"),
                N_("This tag indicates information on the picture-taking "
                "conditions of a particular camera model. The tag is used "
                "only to indicate the picture-taking conditions in the reader."),
                exifId, captureCond, undefined, 0, printValue),
        TagInfo(0xa40c, "SubjectDistanceRange", N_("Subject Distance Range"),
                N_("This tag indicates the distance to the subject."),
                exifId, captureCond, unsignedShort, 1, print0xa40c),
        TagInfo(0xa420, "ImageUniqueID", N_("Image Unique ID"),
                N_("This tag indicates an identifier assigned uniquely to "
                "each image. It is recorded as an ASCII string equivalent "
                "to hexadecimal notation and 128-bit fixed length."),
                exifId, otherTags, asciiString, 33, printValue),
        TagInfo(0xa430, "CameraOwnerName", N_("Camera Owner Name"),
                N_("This tag records the owner of a camera used in "
                "photography as an ASCII string."),
                exifId, otherTags, asciiString, 0, printValue),
        TagInfo(0xa431, "BodySerialNumber", N_("Body Serial Number"),
                N_("This tag records the serial number of the body of the camera "
                "that was used in photography as an ASCII string."),
                exifId, otherTags, asciiString, 0, printValue),
        TagInfo(0xa432, "LensSpecification", N_("Lens Specification"),
                N_("This tag notes minimum focal length, maximum focal length, "
                "minimum F number in the minimum focal length, and minimum F number "
                "in the maximum focal length, which are specification information "
                "for the lens that was used in photography. When the minimum F "
                "number is unknown, the notation is 0/0"),
                exifId, otherTags, unsignedRational, 4, printValue),
        TagInfo(0xa433, "LensMake", N_("Lens Make"),
                N_("This tag records the lens manufactor as an ASCII string."),
                exifId, otherTags, asciiString, 0, printValue),
        TagInfo(0xa434, "LensModel", N_("Lens Model"),
                N_("This tag records the lens's model name and model number as an "
                "ASCII string."),
                exifId, otherTags, asciiString, 0, printValue),
        TagInfo(0xa435, "LensSerialNumber", N_("Lens Serial Number"),
                N_("This tag records the serial number of the interchangeable lens "
                "that was used in photography as an ASCII string."),
                exifId, otherTags, asciiString, 0, printValue),
        // End of list marker
        TagInfo(0xffff, "(UnknownExifTag)", N_("Unknown Exif tag"),
                N_("Unknown Exif tag"),
                exifId, sectionIdNotSet, asciiString, -1, printValue)
    };

    const TagInfo* exifTagList()
    {
        return exifTagInfo;
    }

    //! GPS latitude reference, tag 0x0001; also GPSDestLatitudeRef, tag 0x0013
    extern const TagDetails exifGPSLatitudeRef[] = {
        { 78, N_("North") },
        { 83, N_("South") }
    };

    //! GPS longitude reference, tag 0x0003; also GPSDestLongitudeRef, tag 0x0015
    extern const TagDetails exifGPSLongitudeRef[] = {
        { 69, N_("East") },
        { 87, N_("West") }
    };

    //! GPS altitude reference, tag 0x0005
    extern const TagDetails exifGPSAltitudeRef[] = {
        { 0, N_("Above sea level") },
        { 1, N_("Below sea level") }
    };

    //! GPS status, tag 0x0009
    extern const TagDetails exifGPSStatus[] = {
        { 'A', N_("Measurement in progress")      },
        { 'V', N_("Measurement Interoperability") }
    };

    //! GPS measurement mode, tag 0x000a
    extern const TagDetails exifGPSMeasureMode[] = {
        { '2', N_("Two-dimensional measurement")   },
        { '3', N_("Three-dimensional measurement") }
    };

    //! GPS speed reference, tag 0x000c
    extern const TagDetails exifGPSSpeedRef[] = {
        { 'K', N_("km/h")  },
        { 'M', N_("mph")   },
        { 'N', N_("knots") }
    };

    //! GPS direction ref, tags 0x000e, 0x0010, 0x0017
    extern const TagDetails exifGPSDirRef[] = {
        { 'T', N_("True direction")     },
        { 'M', N_("Magnetic direction") }
    };

    //! GPS Destination distance ref, tag 0x0019
    extern const TagDetails exifGPSDestDistanceRef[] = {
        { 'K', N_("Kilometers") },
        { 'M', N_("Miles")      },
        { 'N', N_("Knots")      }
    };

    //! GPS Differential, tag 0x001e
    extern const TagDetails exifGPSDifferential[] = {
        { 0, N_("Without correction") },
        { 1, N_("Correction applied") }
    };

    // GPS Info Tags
    static const TagInfo gpsTagInfo[] = {
        TagInfo(0x0000, "GPSVersionID", N_("GPS Version ID"),
                N_("Indicates the version of <GPSInfoIFD>. The version is given "
                "as 2.0.0.0. This tag is mandatory when <GPSInfo> tag is "
                "present. (Note: The <GPSVersionID> tag is given in bytes, "
                "unlike the <ExifVersion> tag. When the version is "
                "2.0.0.0, the tag value is 02000000.H)."),
                gpsId, gpsTags, unsignedByte, 4, print0x0000),
        TagInfo(0x0001, "GPSLatitudeRef", N_("GPS Latitude Reference"),
                N_("Indicates whether the latitude is north or south latitude. The "
                "ASCII value 'N' indicates north latitude, and 'S' is south latitude."),
                gpsId, gpsTags, asciiString, 2, EXV_PRINT_TAG(exifGPSLatitudeRef)),
        TagInfo(0x0002, "GPSLatitude", N_("GPS Latitude"),
                N_("Indicates the latitude. The latitude is expressed as three "
                "RATIONAL values giving the degrees, minutes, and seconds, "
                "respectively. When degrees, minutes and seconds are expressed, "
                "the format is dd/1,mm/1,ss/1. When degrees and minutes are used "
                "and, for example, fractions of minutes are given up to two "
                "decimal places, the format is dd/1,mmmm/100,0/1."),
                gpsId, gpsTags, unsignedRational, 3, printDegrees),
        TagInfo(0x0003, "GPSLongitudeRef", N_("GPS Longitude Reference"),
                N_("Indicates whether the longitude is east or west longitude. "
                "ASCII 'E' indicates east longitude, and 'W' is west longitude."),
                gpsId, gpsTags, asciiString, 2, EXV_PRINT_TAG(exifGPSLongitudeRef)),
        TagInfo(0x0004, "GPSLongitude", N_("GPS Longitude"),
                N_("Indicates the longitude. The longitude is expressed as three "
                "RATIONAL values giving the degrees, minutes, and seconds, "
                "respectively. When degrees, minutes and seconds are expressed, "
                "the format is ddd/1,mm/1,ss/1. When degrees and minutes are "
                "used and, for example, fractions of minutes are given up to "
                "two decimal places, the format is ddd/1,mmmm/100,0/1."),
                gpsId, gpsTags, unsignedRational, 3, printDegrees),
        TagInfo(0x0005, "GPSAltitudeRef", N_("GPS Altitude Reference"),
                N_("Indicates the altitude used as the reference altitude. If the "
                "reference is sea level and the altitude is above sea level, 0 "
                "is given. If the altitude is below sea level, a value of 1 is given "
                "and the altitude is indicated as an absolute value in the "
                "GSPAltitude tag. The reference unit is meters. Note that this tag "
                "is BYTE type, unlike other reference tags."),
                gpsId, gpsTags, unsignedByte, 1, print0x0005),
        TagInfo(0x0006, "GPSAltitude", N_("GPS Altitude"),
                N_("Indicates the altitude based on the reference in GPSAltitudeRef. "
                "Altitude is expressed as one RATIONAL value. The reference unit is meters."),
                gpsId, gpsTags, unsignedRational, 1, print0x0006),
        TagInfo(0x0007, "GPSTimeStamp", N_("GPS Time Stamp"),
                N_("Indicates the time as UTC (Coordinated Universal Time). "
                "<TimeStamp> is expressed as three RATIONAL values "
                "giving the hour, minute, and second (atomic clock)."),
                gpsId, gpsTags, unsignedRational, 3, print0x0007),
        TagInfo(0x0008, "GPSSatellites", N_("GPS Satellites"),
                N_("Indicates the GPS satellites used for measurements. This tag can be used "
                "to describe the number of satellites, their ID number, angle of elevation, "
                "azimuth, SNR and other information in ASCII notation. The format is not "
                "specified. If the GPS receiver is incapable of taking measurements, value "
                "of the tag is set to NULL."),
                gpsId, gpsTags, asciiString, 0, printValue),
        TagInfo(0x0009, "GPSStatus", N_("GPS Status"),
                N_("Indicates the status of the GPS receiver when the image is recorded. "
                "\"A\" means measurement is in progress, and \"V\" means the measurement "
                "is Interoperability."),
                gpsId, gpsTags, asciiString, 2, print0x0009),
        TagInfo(0x000a, "GPSMeasureMode", N_("GPS Measure Mode"),
                N_("Indicates the GPS measurement mode. \"2\" means two-dimensional measurement and \"3\" "
                "means three-dimensional measurement is in progress."),
                gpsId, gpsTags, asciiString, 2, print0x000a),
        TagInfo(0x000b, "GPSDOP", N_("GPS Data Degree of Precision"),
                N_("Indicates the GPS DOP (data degree of precision). An HDOP value is written "
                "during two-dimensional measurement, and PDOP during three-dimensional measurement."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x000c, "GPSSpeedRef", N_("GPS Speed Reference"),
                N_("Indicates the unit used to express the GPS receiver speed of movement. "
                "\"K\" \"M\" and \"N\" represents kilometers per hour, miles per hour, and knots."),
                gpsId, gpsTags, asciiString, 2, print0x000c),
        TagInfo(0x000d, "GPSSpeed", N_("GPS Speed"),
                N_("Indicates the speed of GPS receiver movement."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x000e, "GPSTrackRef", N_("GPS Track Ref"),
                N_("Indicates the reference for giving the direction of GPS receiver movement. "
                "\"T\" denotes true direction and \"M\" is magnetic direction."),
                gpsId, gpsTags, asciiString, 2, printGPSDirRef),
        TagInfo(0x000f, "GPSTrack", N_("GPS Track"),
                N_("Indicates the direction of GPS receiver movement. The range of values is "
                "from 0.00 to 359.99."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x0010, "GPSImgDirectionRef", N_("GPS Image Direction Reference"),
                N_("Indicates the reference for giving the direction of the image when it is captured. "
                "\"T\" denotes true direction and \"M\" is magnetic direction."),
                gpsId, gpsTags, asciiString, 2, printGPSDirRef),
        TagInfo(0x0011, "GPSImgDirection", N_("GPS Image Direction"),
                N_("Indicates the direction of the image when it was captured. The range of values "
                "is from 0.00 to 359.99."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x0012, "GPSMapDatum", N_("GPS Map Datum"),
                N_("Indicates the geodetic survey data used by the GPS receiver. If the survey data "
                "is restricted to Japan, the value of this tag is \"TOKYO\" or \"WGS-84\"."),
                gpsId, gpsTags, asciiString, 0, printValue),
        TagInfo(0x0013, "GPSDestLatitudeRef", N_("GPS Destination Latitude Refeference"),
                N_("Indicates whether the latitude of the destination point is north or south latitude. "
                "The ASCII value \"N\" indicates north latitude, and \"S\" is south latitude."),
                gpsId, gpsTags, asciiString, 2, EXV_PRINT_TAG(exifGPSLatitudeRef)),
        TagInfo(0x0014, "GPSDestLatitude", N_("GPS Destination Latitude"),
                N_("Indicates the latitude of the destination point. The latitude is expressed as "
                "three RATIONAL values giving the degrees, minutes, and seconds, respectively. "
                "If latitude is expressed as degrees, minutes and seconds, a typical format would "
                "be dd/1,mm/1,ss/1. When degrees and minutes are used and, for example, "
                "fractions of minutes are given up to two decimal places, the format would be "
                "dd/1,mmmm/100,0/1."),
                gpsId, gpsTags, unsignedRational, 3, printDegrees),
        TagInfo(0x0015, "GPSDestLongitudeRef", N_("GPS Destination Longitude Reference"),
                N_("Indicates whether the longitude of the destination point is east or west longitude. "
                "ASCII \"E\" indicates east longitude, and \"W\" is west longitude."),
                gpsId, gpsTags, asciiString, 2, EXV_PRINT_TAG(exifGPSLongitudeRef)),
        TagInfo(0x0016, "GPSDestLongitude", N_("GPS Destination Longitude"),
                N_("Indicates the longitude of the destination point. The longitude is expressed "
                "as three RATIONAL values giving the degrees, minutes, and seconds, respectively. "
                "If longitude is expressed as degrees, minutes and seconds, a typical format would be "
                "ddd/1,mm/1,ss/1. When degrees and minutes are used and, for example, fractions of "
                "minutes are given up to two decimal places, the format would be ddd/1,mmmm/100,0/1."),
                gpsId, gpsTags, unsignedRational, 3, printDegrees),
        TagInfo(0x0017, "GPSDestBearingRef", N_("GPS Destination Bearing Reference"),
                N_("Indicates the reference used for giving the bearing to the destination point. "
                "\"T\" denotes true direction and \"M\" is magnetic direction."),
                gpsId, gpsTags, asciiString, 2, printGPSDirRef),
        TagInfo(0x0018, "GPSDestBearing", N_("GPS Destination Bearing"),
                N_("Indicates the bearing to the destination point. The range of values is from "
                "0.00 to 359.99."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x0019, "GPSDestDistanceRef", N_("GPS Destination Distance Reference"),
                N_("Indicates the unit used to express the distance to the destination point. "
                "\"K\", \"M\" and \"N\" represent kilometers, miles and knots."),
                gpsId, gpsTags, asciiString, 2, print0x0019),
        TagInfo(0x001a, "GPSDestDistance", N_("GPS Destination Distance"),
                N_("Indicates the distance to the destination point."),
                gpsId, gpsTags, unsignedRational, 1, printValue),
        TagInfo(0x001b, "GPSProcessingMethod", N_("GPS Processing Method"),
                N_("A character string recording the name of the method used for location finding. "
                "The first byte indicates the character code used, and this is followed by the name "
                "of the method."),
                gpsId, gpsTags, undefined, 0, printValue),
        TagInfo(0x001c, "GPSAreaInformation", N_("GPS Area Information"),
                N_("A character string recording the name of the GPS area. The first byte indicates "
                "the character code used, and this is followed by the name of the GPS area."),
                gpsId, gpsTags, undefined, 0, printValue),
        TagInfo(0x001d, "GPSDateStamp", N_("GPS Date Stamp"),
                N_("A character string recording date and time information relative to UTC "
                "(Coordinated Universal Time). The format is \"YYYY:MM:DD.\"."),
                gpsId, gpsTags, asciiString, 11, printValue),
        TagInfo(0x001e, "GPSDifferential", N_("GPS Differential"),
                N_("Indicates whether differential correction is applied to the GPS receiver."),
                gpsId, gpsTags, unsignedShort, 1, print0x001e),
        // End of list marker
        TagInfo(0xffff, "(UnknownGpsTag)", N_("Unknown GPSInfo tag"),
                N_("Unknown GPSInfo tag"),
                gpsId, gpsTags, asciiString, -1, printValue)
    };

    const TagInfo* gpsTagList()
    {
        return gpsTagInfo;
    }

    // Exif Interoperability IFD Tags
    static const TagInfo iopTagInfo[] = {
        TagInfo(0x0001, "InteroperabilityIndex", N_("Interoperability Index"),
                N_("Indicates the identification of the Interoperability rule. "
                "Use \"R98\" for stating ExifR98 Rules. Four bytes used "
                "including the termination code (NULL). see the separate "
                "volume of Recommended Exif Interoperability Rules (ExifR98) "
                "for other tags used for ExifR98."),
                iopId, iopTags, asciiString, 0, printValue),
        TagInfo(0x0002, "InteroperabilityVersion", N_("Interoperability Version"),
                N_("Interoperability version"),
                iopId, iopTags, undefined, -1, printExifVersion),
        TagInfo(0x1000, "RelatedImageFileFormat", N_("Related Image File Format"),
                N_("File format of image file"),
                iopId, iopTags, asciiString, 0, printValue),
        TagInfo(0x1001, "RelatedImageWidth", N_("Related Image Width"),
                N_("Image width"),
                iopId, iopTags, unsignedLong, 1, printValue),
        TagInfo(0x1002, "RelatedImageLength", N_("Related Image Length"),
                N_("Image height"),
                iopId, iopTags, unsignedLong, 1, printValue),
        // End of list marker
        TagInfo(0xffff, "(UnknownIopTag)", N_("Unknown Exif Interoperability tag"),
                N_("Unknown Exif Interoperability tag"),
                iopId, iopTags, asciiString, -1, printValue)
    };

    const TagInfo* iopTagList()
    {
        return iopTagInfo;
    }

    // Synthesized Exiv2 Makernote info Tags (read-only)
    static const TagInfo mnTagInfo[] = {
        TagInfo(0x0001, "Offset", N_("Offset"),
                N_("Offset of the makernote from the start of the TIFF header."),
                mnId, makerTags, unsignedLong, 1, printValue),
        TagInfo(0x0002, "ByteOrder", N_("Byte Order"),
                N_("Byte order used to encode MakerNote tags, 'MM' (big-endian) or 'II' (little-endian)."),
                mnId, makerTags, asciiString, 0, printValue),
        // End of list marker
        TagInfo(0xffff, "(UnknownMnTag)", N_("Unknown Exiv2 Makernote info tag"),
                N_("Unknown Exiv2 Makernote info tag"),
                mnId, makerTags, asciiString, -1, printValue)
    };

    const TagInfo* mnTagList()
    {
        return mnTagInfo;
    }

    // Unknown Tag
    static const TagInfo unknownTag(0xffff, "Unknown tag", N_("Unknown tag"),
                                    N_("Unknown tag"),
                                    ifdIdNotSet, sectionIdNotSet, asciiString, -1, printValue);

    std::ostream& printValue(std::ostream& os, const Value& value, const ExifData*)
    {
        return os << value;
    }

    IfdId groupId(const std::string& groupName)
    {
        IfdId ifdId = ifdIdNotSet;
        const GroupInfo* ii = find(groupInfo, GroupInfo::GroupName(groupName));
        if (ii != 0) ifdId = static_cast<IfdId>(ii->ifdId_);
        return ifdId;
    }

    const char* ifdName(IfdId ifdId)
    {
        const GroupInfo* ii = find(groupInfo, ifdId);
        if (ii == 0) return groupInfo[0].ifdName_;
        return ii->ifdName_;
    } // ifdName

    const char* groupName(IfdId ifdId)
    {
        const GroupInfo* ii = find(groupInfo, ifdId);
        if (ii == 0) return groupInfo[0].groupName_;
        return ii->groupName_;
    } // groupName

    bool isMakerIfd(IfdId ifdId)
    {
        bool rc = false;
        const GroupInfo* ii = find(groupInfo, ifdId);
        if (ii != 0 && 0 == strcmp(ii->ifdName_, "Makernote")) {
            rc = true;
        }
        return rc;
    } // isMakerIfd

    bool isExifIfd(IfdId ifdId)
    {
        bool rc;
        switch (ifdId) {
        case ifd0Id:
        case exifId:
        case gpsId:
        case iopId:
        case ifd1Id:
        case ifd2Id:
        case ifd3Id:
        case subImage1Id:
        case subImage2Id:
        case subImage3Id:
        case subImage4Id:
        case subImage5Id:
        case subImage6Id:
        case subImage7Id:
        case subImage8Id:
        case subImage9Id:
        case subThumb1Id:
        case panaRawId: rc = true; break;
        default:           rc = false; break;
        }
        return rc;
    } // isExifIfd

    void taglist(std::ostream& os, IfdId ifdId)
    {
        const TagInfo* ti = Internal::tagList(ifdId);
        if (ti != 0) {
            for (int k = 0; ti[k].tag_ != 0xffff; ++k) {
                os << ti[k] << "\n";
            }
        }
    } // taglist

    const TagInfo* tagList(IfdId ifdId)
    {
        const GroupInfo* ii = find(groupInfo, ifdId);
        if (ii == 0 || ii->tagList_ == 0) return 0;
        return ii->tagList_();
    } // tagList

    const TagInfo* tagInfo(uint16_t tag, IfdId ifdId)
    {
        const TagInfo* ti = tagList(ifdId);
        if (ti == 0) return 0;
        int idx = 0;
        for (idx = 0; ti[idx].tag_ != 0xffff; ++idx) {
            if (ti[idx].tag_ == tag) break;
        }
        return &ti[idx];
    } // tagInfo

    const TagInfo* tagInfo(const std::string& tagName, IfdId ifdId)
    {
        const TagInfo* ti = tagList(ifdId);
        if (ti == 0) return 0;
        const char* tn = tagName.c_str();
        if (tn == 0) return 0;
        for (int idx = 0; ti[idx].tag_ != 0xffff; ++idx) {
            if (0 == strcmp(ti[idx].name_, tn)) {
                return &ti[idx];
            }
        }
        return 0;
    } // tagInfo

    uint16_t tagNumber(const std::string& tagName, IfdId ifdId)
    {
        const TagInfo* ti = tagInfo(tagName, ifdId);
        if (ti != 0 && ti->tag_ != 0xffff) return ti->tag_;
        if (!isHex(tagName, 4, "0x")) throw Error(7, tagName, ifdId);
        std::istringstream is(tagName);
        uint16_t tag;
        is >> std::hex >> tag;
        return tag;
    } // tagNumber

    std::ostream& printLong(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational r = value.toRational();
        if (r.second != 0) return os << static_cast<long>(r.first) / r.second;
        return os << "(" << value << ")";
    } // printLong

    std::ostream& printFloat(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational r = value.toRational();
        if (r.second != 0) return os << static_cast<float>(r.first) / r.second;
        return os << "(" << value << ")";
    } // printFloat

    std::ostream& printDegrees(std::ostream& os, const Value& value, const ExifData*)
    {
        if (value.count() == 3) {
            std::ostringstream oss;
            oss.copyfmt(os);
            static const char* unit[] = { "deg", "'", "\"" };
            static const int prec[] = { 7, 5, 3 };
            int n;
            for (n = 2; n > 0; --n) {
                if (value.toRational(n).first != 0) break;
            }
            for (int i = 0; i < n + 1; ++i) {
                const int32_t z = value.toRational(i).first;
                const int32_t d = value.toRational(i).second;
                if (d == 0) return os << "(" << value << ")";
                // Hack: Need Value::toDouble
                double b = static_cast<double>(z)/d;
                const int p = z % d == 0 ? 0 : prec[i];
                os << std::fixed << std::setprecision(p) << b
                   << unit[i] << " ";
            }
            os.copyfmt(oss);
        }
        else {
            os << value;
        }

        return os;
    } // printDegrees

    std::ostream& printUcs2(std::ostream& os, const Value& value, const ExifData*)
    {
        bool cnv = false;
        if (value.typeId() == unsignedByte && value.size() > 0) {
            DataBuf buf(value.size());
            value.copy(buf.pData_, invalidByteOrder);
            // Strip trailing UCS-2 0-character, if there is one
            if (buf.pData_[buf.size_ - 1] == 0 && buf.pData_[buf.size_ - 2] == 0)  buf.size_ -= 2;
            std::string str((const char*)buf.pData_, buf.size_);
            cnv = convertStringCharset(str, "UCS-2LE", "UTF-8");
            if (cnv) os << str;
        }
        if (!cnv) os << value;
        return os;
    } // printUcs2

    std::ostream& printExifUnit(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifUnit)(os, value, metadata);
    }

    std::ostream& print0x0000(std::ostream& os, const Value& value, const ExifData*)
    {
        if (value.size() != 4 || value.typeId() != unsignedByte) {
            return os << value;
        }

        for (int i = 0; i < 3; i++) {
            os << value.toLong(i);
            os << ".";
        }
        os << value.toLong(3);

        return os;
    }

    std::ostream& print0x0005(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSAltitudeRef)(os, value, metadata);
    }

    std::ostream& print0x0006(std::ostream& os, const Value& value, const ExifData*)
    {
        std::ostringstream oss;
        oss.copyfmt(os);
        const int32_t d = value.toRational().second;
        if (d == 0) return os << "(" << value << ")";
        const int p = d > 1 ? 1 : 0;
        os << std::fixed << std::setprecision(p) << value.toFloat() << " m";
        os.copyfmt(oss);

        return os;
    }

    std::ostream& print0x0007(std::ostream& os, const Value& value, const ExifData*)
    {
        if (value.count() == 3) {
            for (int i = 0; i < 3; ++i) {
                if (value.toRational(i).second == 0) {
                    return os << "(" << value << ")";
                }
            }
            std::ostringstream oss;
            oss.copyfmt(os);
            const float sec = 3600 * value.toFloat(0)
                              + 60 * value.toFloat(1)
                              + value.toFloat(2);
            int p = 0;
            if (sec != static_cast<int>(sec)) p = 1;

            const int hh = static_cast<int>(sec / 3600);
            const int mm = static_cast<int>((sec - 3600 * hh) / 60);
            const float ss = sec - 3600 * hh - 60 * mm;

            os << std::setw(2) << std::setfill('0') << std::right << hh << ":"
               << std::setw(2) << std::setfill('0') << std::right << mm << ":"
               << std::setw(2 + p * 2) << std::setfill('0') << std::right
               << std::fixed << std::setprecision(p) << ss;

            os.copyfmt(oss);
        }
        else {
            os << value;
        }

        return os;
    }

    std::ostream& print0x0009(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSStatus)(os, value, metadata);
    }

    std::ostream& print0x000a(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSMeasureMode)(os, value, metadata);
    }

    std::ostream& print0x000c(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSSpeedRef)(os, value, metadata);
    }

    std::ostream& print0x0019(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSDestDistanceRef)(os, value, metadata);
    }

    std::ostream& print0x001e(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSDifferential)(os, value, metadata);
    }

    std::ostream& print0x0112(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifOrientation)(os, value, metadata);
    }

    std::ostream& print0x0213(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifYCbCrPositioning)(os, value, metadata);
    }

    std::ostream& print0x8298(std::ostream& os, const Value& value, const ExifData*)
    {
        // Print the copyright information in the format Photographer, Editor
        std::string val = value.toString();
        std::string::size_type pos = val.find('\0');
        if (pos != std::string::npos) {
            std::string photographer(val, 0, pos);
            if (photographer != " ") os << photographer;
            std::string editor(val, pos + 1);
            if (editor != "") {
                if (photographer != " ") os << ", ";
                os << editor;
            }
        }
        else {
            os << val;
        }
        return os;
    }

    std::ostream& print0x829a(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational t = value.toRational();
        if (t.first > 1 && t.second > 1 && t.second >= t.first) {
            t.second = static_cast<uint32_t>(
                static_cast<float>(t.second) / t.first + 0.5);
            t.first = 1;
        }
        if (t.second > 1 && t.second < t.first) {
            t.first = static_cast<uint32_t>(
                static_cast<float>(t.first) / t.second + 0.5);
            t.second = 1;
        }
        if (t.second == 1) {
            os << t.first << " s";
        }
        else {
            os << t.first << "/" << t.second << " s";
        }
        return os;
    }

    std::ostream& print0x829d(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational fnumber = value.toRational();
        if (fnumber.second != 0) {
            std::ostringstream oss;
            oss.copyfmt(os);
            os << "F" << std::setprecision(2)
               << static_cast<float>(fnumber.first) / fnumber.second;
            os.copyfmt(oss);
        }
        else {
            os << "(" << value << ")";
        }
        return os;
    }

    std::ostream& print0x8822(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifExposureProgram)(os, value, metadata);
    }

    std::ostream& print0x8827(std::ostream& os, const Value& value, const ExifData*)
    {
        return os << value.toLong();
    }

    std::ostream& print0x9101(std::ostream& os, const Value& value, const ExifData*)
    {
        for (long i = 0; i < value.count(); ++i) {
            long l = value.toLong(i);
            switch (l) {
            case 0:  break;
            case 1:  os << "Y"; break;
            case 2:  os << "Cb"; break;
            case 3:  os << "Cr"; break;
            case 4:  os << "R"; break;
            case 5:  os << "G"; break;
            case 6:  os << "B"; break;
            default: os << "(" << l << ")"; break;
            }
        }
        return os;
    }

    std::ostream& print0x9201(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational r = value.toRational();
        if (!value.ok() || r.second == 0) return os << "(" << value << ")";

        URational ur = exposureTime(static_cast<float>(r.first) / r.second);
        os << ur.first;
        if (ur.second > 1) {
            os << "/" << ur.second;
        }
        return os << " s";
    }

    std::ostream& print0x9202(std::ostream& os, const Value& value, const ExifData*)
    {
        if (   value.count() == 0
            || value.toRational().second == 0) {
            return os << "(" << value << ")";
        }
        std::ostringstream oss;
        oss.copyfmt(os);
        os << "F" << std::setprecision(2) << fnumber(value.toFloat());
        os.copyfmt(oss);
        return os;
    }

    std::ostream& print0x9204(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational bias = value.toRational();
        if (bias.second <= 0) {
            os << "(" << bias.first << "/" << bias.second << ")";
        }
        else if (bias.first == 0) {
            os << "0 EV";
        }
        else {
            int32_t d = gcd(bias.first, bias.second);
            int32_t num = std::abs(bias.first) / d;
            int32_t den = bias.second / d;
            os << (bias.first < 0 ? "-" : "+") << num;
            if (den != 1) {
                os << "/" << den;
            }
            os << " EV";
        }
        return os;
    }

    std::ostream& print0x9206(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational distance = value.toRational();
        if (distance.first == 0) {
            os << _("Unknown");
        }
        else if (static_cast<uint32_t>(distance.first) == 0xffffffff) {
            os << _("Infinity");
        }
        else if (distance.second != 0) {
            std::ostringstream oss;
            oss.copyfmt(os);
            os << std::fixed << std::setprecision(2)
               << (float)distance.first / distance.second
               << " m";
            os.copyfmt(oss);
        }
        else {
            os << "(" << value << ")";
        }
        return os;
    }

    std::ostream& print0x9207(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifMeteringMode)(os, value, metadata);
    }

    std::ostream& print0x9208(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifLightSource)(os, value, metadata);
    }

    std::ostream& print0x920a(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational length = value.toRational();
        if (length.second != 0) {
            std::ostringstream oss;
            oss.copyfmt(os);
            os << std::fixed << std::setprecision(1)
               << (float)length.first / length.second
               << " mm";
            os.copyfmt(oss);
        }
        else {
            os << "(" << value << ")";
        }
        return os;
    }

    std::ostream& print0x9286(std::ostream& os, const Value& value, const ExifData*)
    {
        const CommentValue* pcv = dynamic_cast<const CommentValue*>(&value);
        if (pcv) {
            os << pcv->comment();
        }
        else {
            os << value;
        }
        return os;
    }

    std::ostream& print0xa001(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifColorSpace)(os, value, metadata);
    }

    std::ostream& print0xa217(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifSensingMethod)(os, value, metadata);
    }

    std::ostream& print0xa300(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifFileSource)(os, value, metadata);
    }

    std::ostream& print0xa301(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifSceneType)(os, value, metadata);
    }

    std::ostream& print0xa401(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifCustomRendered)(os, value, metadata);
    }

    std::ostream& print0xa402(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifExposureMode)(os, value, metadata);
    }

    std::ostream& print0xa403(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifWhiteBalance)(os, value, metadata);
    }

    std::ostream& print0xa404(std::ostream& os, const Value& value, const ExifData*)
    {
        Rational zoom = value.toRational();
        if (zoom.second == 0) {
            os << _("Digital zoom not used");
        }
        else {
            std::ostringstream oss;
            oss.copyfmt(os);
            os << std::fixed << std::setprecision(1)
               << (float)zoom.first / zoom.second;
            os.copyfmt(oss);
        }
        return os;
    }

    std::ostream& print0xa405(std::ostream& os, const Value& value, const ExifData*)
    {
        long length = value.toLong();
        if (length == 0) {
            os << _("Unknown");
        }
        else {
            os << length << ".0 mm";
        }
        return os;
    }

    std::ostream& print0xa406(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifSceneCaptureType)(os, value, metadata);
    }

    std::ostream& print0xa407(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGainControl)(os, value, metadata);
    }

    std::ostream& print0xa409(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifSaturation)(os, value, metadata);
    }

    std::ostream& print0xa40c(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifSubjectDistanceRange)(os, value, metadata);
    }

    std::ostream& printGPSDirRef(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifGPSDirRef)(os, value, metadata);
    }

    std::ostream& printNormalSoftHard(std::ostream& os, const Value& value, const ExifData* metadata)
    {
        return EXV_PRINT_TAG(exifNormalSoftHard)(os, value, metadata);
    }

    std::ostream& printExifVersion(std::ostream& os, const Value& value, const ExifData*)
    {
        if (value.size() != 4 || value.typeId() != undefined) {
            return os << "(" << value << ")";
        }

        char s[5];
        for (int i = 0; i < 4; ++i) {
            s[i] = static_cast<char>(value.toLong(i));
        }
        s[4] = '\0';

        return printVersion(os, s);
    }

    std::ostream& printXmpVersion(std::ostream& os, const Value& value, const ExifData*)
    {
        if (value.size() != 4 || value.typeId() != xmpText) {
            return os << "(" << value << ")";
        }

        return printVersion(os, value.toString());
    }

    std::ostream& printXmpDate(std::ostream& os, const Value& value, const ExifData*)
    {
        if (!(value.size() == 19 || value.size() == 20) || value.typeId() != xmpText) {
            return os << value;
        }

        std::string stringValue = value.toString();
        if (stringValue[19] == 'Z') {
            stringValue = stringValue.substr(0, 19);
        }
        for (unsigned int i = 0; i < stringValue.length(); ++i) {
            if (stringValue[i] == 'T') stringValue[i] = ' ';
            if (stringValue[i] == '-') stringValue[i] = ':';
        }

        return os << stringValue;
    }

    float fnumber(float apertureValue)
    {
        return static_cast<float>(std::exp(std::log(2.0) * apertureValue / 2));
    }

    URational exposureTime(float shutterSpeedValue)
    {
        URational ur(1, 1);
        double tmp = std::exp(std::log(2.0) * shutterSpeedValue);
        if (tmp > 1) {
            ur.second = static_cast<long>(tmp + 0.5);
        }
        else {
            ur.first = static_cast<long>(1/tmp + 0.5);
        }
        return ur;
    }

}}                                      // namespace Internal, Exiv2

namespace Exiv2 {

    //! @cond IGNORE
    GroupInfo::GroupName::GroupName(const std::string& groupName)
    {
        g_ = groupName;
    }
    //! @endcond

    bool GroupInfo::operator==(int ifdId) const
    {
        return ifdId_ == ifdId;
    }

    bool GroupInfo::operator==(const GroupName& groupName) const
    {
        return 0 == strcmp(groupName.g_.c_str(), groupName_);
    }

    TagInfo::TagInfo(
        uint16_t tag,
        const char* name,
        const char* title,
        const char* desc,
        int ifdId,
        int sectionId,
        TypeId typeId,
        int16_t count,
        PrintFct printFct
    )
        : tag_(tag), name_(name), title_(title), desc_(desc), ifdId_(ifdId),
          sectionId_(sectionId), typeId_(typeId), count_(count), printFct_(printFct)
    {
    }

    const GroupInfo* ExifTags::groupList()
    {
        return groupInfo + 1; // +1 to skip the first (ifdIdNotSet) entry
    }

    const TagInfo* ExifTags::tagList(const std::string& groupName)
    {
        const GroupInfo* ii = find(groupInfo, GroupInfo::GroupName(groupName));
        if (ii == 0 || ii->tagList_ == 0) return 0;
        return ii->tagList_();
    } // ExifTags::tagList

    const char* ExifTags::sectionName(const ExifKey& key)
    {
        const TagInfo* ti = tagInfo(key.tag(), static_cast<Internal::IfdId>(key.ifdId()));
        if (ti == 0) return sectionInfo[unknownTag.sectionId_].name_;
        return sectionInfo[ti->sectionId_].name_;
    }

    uint16_t ExifTags::defaultCount(const ExifKey& key)
    {
        const TagInfo* ti = tagInfo(key.tag(), static_cast<Internal::IfdId>(key.ifdId()));
        if (ti == 0) return unknownTag.count_;
        return ti->count_;
    }

    const char* ExifTags::ifdName(const std::string& groupName)
    {
        IfdId ifdId = Internal::groupId(groupName);        
        return Internal::ifdName(ifdId);
    }

    bool ExifTags::isMakerGroup(const std::string& groupName)
    {
        IfdId ifdId = Internal::groupId(groupName);
        return Internal::isMakerIfd(ifdId);
    }

    bool ExifTags::isExifGroup(const std::string& groupName)
    {
        IfdId ifdId = Internal::groupId(groupName);
        return Internal::isExifIfd(ifdId);
    }

    void ExifTags::taglist(std::ostream& os)
    {
        for (int i=0; ifdTagInfo[i].tag_ != 0xffff; ++i) {
            os << ifdTagInfo[i] << "\n";
        }
        for (int i=0; exifTagInfo[i].tag_ != 0xffff; ++i) {
            os << exifTagInfo[i] << "\n";
        }
        for (int i=0; iopTagInfo[i].tag_ != 0xffff; ++i) {
            os << iopTagInfo[i] << "\n";
        }
        for (int i=0; gpsTagInfo[i].tag_ != 0xffff; ++i) {
            os << gpsTagInfo[i] << "\n";
        }
    } // ExifTags::taglist

    void ExifTags::taglist(std::ostream& os, const std::string& groupName)
    {
        IfdId ifdId = Internal::groupId(groupName);
        Internal::taglist(os, ifdId);
    }

    //! %Internal Pimpl structure with private members and data of class ExifKey.
    struct ExifKey::Impl {
        //! @name Creators
        //@{
        Impl();                         //!< Default constructor
        //@}

        //! @name Manipulators
        //@{
        /*!
          @brief Set the key corresponding to the \em tag, \em ifdId and \em tagInfo.
                 The key is of the form '<b>Exif</b>.groupName.tagName'.
         */
        void makeKey(uint16_t tag, IfdId ifdId, const TagInfo* tagInfo);
        /*!
          @brief Parse and convert the key string into tag and IFD Id.
                 Updates data members if the string can be decomposed,
                 or throws \em Error .

          @throw Error if the key cannot be decomposed.
         */
        void decomposeKey(const std::string& key);
        //@}

        //! @name Accessors
        //@{
        //! Return the name of the tag
        std::string tagName() const;
        //@}

        // DATA
        static const char* familyName_; //!< "Exif"

        const TagInfo* tagInfo_;        //!< Tag info
        uint16_t tag_;                  //!< Tag value
        IfdId ifdId_;                   //!< The IFD associated with this tag
        int idx_;                       //!< Unique id of the Exif key in the image
        std::string groupName_;         //!< The group name
        std::string key_;               //!< %Key
    };

    const char* ExifKey::Impl::familyName_ = "Exif";

    ExifKey::Impl::Impl()
        : tagInfo_(0), tag_(0), ifdId_(ifdIdNotSet), idx_(0)
    {
    }

    std::string ExifKey::Impl::tagName() const
    {
        if (tagInfo_ != 0 && tagInfo_->tag_ != 0xffff) {
            return tagInfo_->name_;
        }
        std::ostringstream os;
        os << "0x" << std::setw(4) << std::setfill('0') << std::right
           << std::hex << tag_;
        return os.str();
    }

    void ExifKey::Impl::decomposeKey(const std::string& key)
    {
        // Get the family name, IFD name and tag name parts of the key
        std::string::size_type pos1 = key.find('.');
        if (pos1 == std::string::npos) throw Error(6, key);
        std::string familyName = key.substr(0, pos1);
        if (0 != strcmp(familyName.c_str(), familyName_)) {
            throw Error(6, key);
        }
        std::string::size_type pos0 = pos1 + 1;
        pos1 = key.find('.', pos0);
        if (pos1 == std::string::npos) throw Error(6, key);
        std::string groupName = key.substr(pos0, pos1 - pos0);
        if (groupName.empty()) throw Error(6, key);
        std::string tn = key.substr(pos1 + 1);
        if (tn.empty()) throw Error(6, key);

        // Find IfdId
        IfdId ifdId = groupId(groupName);
        if (ifdId == ifdIdNotSet) throw Error(6, key);
        if (!Internal::isExifIfd(ifdId) && !Internal::isMakerIfd(ifdId)) {
            throw Error(6, key);
        }
        // Convert tag
        uint16_t tag = tagNumber(tn, ifdId);
        // Get tag info
        tagInfo_ = tagInfo(tag, ifdId);
        if (tagInfo_ == 0) throw Error(6, key);

        tag_ = tag;
        ifdId_ = ifdId;
        groupName_ = groupName;
        // tagName() translates hex tag name (0xabcd) to a real tag name if there is one
        key_ = familyName + "." + groupName + "." + tagName();
    }

    void ExifKey::Impl::makeKey(uint16_t tag, IfdId ifdId, const TagInfo* tagInfo)
    {
        assert(tagInfo != 0);

        tagInfo_ = tagInfo;
        tag_ = tag;
        ifdId_ = ifdId;
        key_ = std::string(familyName_) + "." + groupName_ + "." + tagName();
    }

    ExifKey::ExifKey(uint16_t tag, const std::string& groupName)
        : p_(new Impl)
    {
        IfdId ifdId = groupId(groupName);
        // Todo: Test if this condition can be removed
        if (!Internal::isExifIfd(ifdId) && !Internal::isMakerIfd(ifdId)) {
            throw Error(23, ifdId);
        }
        const TagInfo* ti = tagInfo(tag, ifdId);
        if (ti == 0) {
            throw Error(23, ifdId);
        }
        p_->groupName_ = groupName;
        p_->makeKey(tag, ifdId, ti);
    }

    ExifKey::ExifKey(const TagInfo& ti)
        : p_(new Impl)
    {
        IfdId ifdId = static_cast<IfdId>(ti.ifdId_);
        if (!Internal::isExifIfd(ifdId) && !Internal::isMakerIfd(ifdId)) {
            throw Error(23, ifdId);
        }
        p_->groupName_ = Exiv2::groupName(ifdId);
        p_->makeKey(ti.tag_, ifdId, &ti);
    }

    ExifKey::ExifKey(const std::string& key)
        : p_(new Impl)
    {
        p_->decomposeKey(key);
    }

    ExifKey::ExifKey(const ExifKey& rhs)
        : Key(rhs), p_(new Impl(*rhs.p_))
    {
    }

    ExifKey::~ExifKey()
    {
        delete p_;
    }

    ExifKey& ExifKey::operator=(const ExifKey& rhs)
    {
        if (this == &rhs) return *this;
        Key::operator=(rhs);
        *p_ = *rhs.p_;
        return *this;
    }

    void ExifKey::setIdx(int idx)
    {
        p_->idx_ = idx;
    }

    std::string ExifKey::key() const
    {
        return p_->key_;
    }

    const char* ExifKey::familyName() const
    {
        return p_->familyName_;
    }

    std::string ExifKey::groupName() const
    {
        return p_->groupName_;
    }

    std::string ExifKey::tagName() const
    {
        return p_->tagName();
    }

    std::string ExifKey::tagLabel() const
    {
        if (p_->tagInfo_ == 0 || p_->tagInfo_->tag_ == 0xffff) return "";
        return _(p_->tagInfo_->title_);
    }

    std::string ExifKey::tagDesc() const
    {
        if (p_->tagInfo_ == 0 || p_->tagInfo_->tag_ == 0xffff) return "";
        return _(p_->tagInfo_->desc_);
    }

    TypeId ExifKey::defaultTypeId() const
    {
        if (p_->tagInfo_ == 0) return unknownTag.typeId_;
        return p_->tagInfo_->typeId_;
    }

    uint16_t ExifKey::tag() const
    {
        return p_->tag_;
    }

    ExifKey::AutoPtr ExifKey::clone() const
    {
        return AutoPtr(clone_());
    }

    ExifKey* ExifKey::clone_() const
    {
        return new ExifKey(*this);
    }

    int ExifKey::ifdId() const
    {
        return p_->ifdId_;
    }

    int ExifKey::idx() const
    {
        return p_->idx_;
    }

    // *************************************************************************
    // free functions

    std::ostream& operator<<(std::ostream& os, const TagInfo& ti)
    {
        ExifKey exifKey(ti);
        return os << exifKey.tagName() << ",\t"
                  << std::dec << exifKey.tag() << ",\t"
                  << "0x" << std::setw(4) << std::setfill('0')
                  << std::right << std::hex << exifKey.tag() << ",\t"
                  << exifKey.groupName() << ",\t"
                  << exifKey.key() << ",\t"
                  << TypeInfo::typeName(exifKey.defaultTypeId()) << ",\t"
                  << exifKey.tagDesc();
    }

}                                       // namespace Exiv2

namespace {
    std::ostream& printVersion(std::ostream& os, const std::string& str)
    {
        if (str.size() != 4) {
            return os << "(" << str << ")";
        }
        if (str[0] != '0') os << str[0];
        return os << str[1] << "." << str[2] << str[3];
    }
}
