IGMDTAG_NAME_EXIF_HEADER                 "EXIF_HEADER"
IGMDTAG_NAME_EXIF_FORMAT                 "EXIF"
/* GPS IFD tag names*/
IGMDTAG_NAME_EXIF_GPS_VERSIONID           "GPSVersionID"
IGMDTAG_NAME_EXIF_GPS_LATITUDEREF         "GPSLatitudeRef"
IGMDTAG_NAME_EXIF_GPS_LATITUDE            "GPSLatitude"
IGMDTAG_NAME_EXIF_GPS_LONGITUDEREF        "GPSLongitudeRef"
IGMDTAG_NAME_EXIF_GPS_LONGITUDE           "GPSLongitude"
IGMDTAG_NAME_EXIF_GPS_ALTITUDEREF         "GPSAltitudeRef"
IGMDTAG_NAME_EXIF_GPS_ALTITUDE            "GPSAltitude"
IGMDTAG_NAME_EXIF_GPS_TIMESTAMP           "GPSTimeStamp"
IGMDTAG_NAME_EXIF_GPS_SATELLITES          "GPSSatellites"
IGMDTAG_NAME_EXIF_GPS_STATUS              "GPSStatus"
IGMDTAG_NAME_EXIF_GPS_MEASUREMODE         "GPSMeasureMode"
IGMDTAG_NAME_EXIF_GPS_DOP                 "GPSDOP"
IGMDTAG_NAME_EXIF_GPS_SPEEDREF            "GPSSpeedRef"
IGMDTAG_NAME_EXIF_GPS_SPEED               "GPSSpeed"
IGMDTAG_NAME_EXIF_GPS_TRACKREF            "GPSTrackRef"
IGMDTAG_NAME_EXIF_GPS_TRACK               "GPSTrack"
IGMDTAG_NAME_EXIF_GPS_IMGDIRECTIONREF     "GPSImgDirectionRef"
IGMDTAG_NAME_EXIF_GPS_IMGDIRECTION        "GPSImgDirection"
IGMDTAG_NAME_EXIF_GPS_MAPDATUM            "GPSMapDatum"
IGMDTAG_NAME_EXIF_GPS_DESTLATITUDEREF     "GPSDestLatitudeRef"
IGMDTAG_NAME_EXIF_GPS_DESTLATITUDE        "GPSDestLatitude"
IGMDTAG_NAME_EXIF_GPS_DESTLONGITUDEREF    "GPSDestLongitudeRef"
IGMDTAG_NAME_EXIF_GPS_DESTLONGITUDE       "GPSDestLongitude"
IGMDTAG_NAME_EXIF_GPS_DESTBEARINGREF      "GPSDestBearingRef"
IGMDTAG_NAME_EXIF_GPS_DESTBEARING         "GPSDestBearing"
IGMDTAG_NAME_EXIF_GPS_DESTDISTANCEREF     "GPSDestDistanceRef"
IGMDTAG_NAME_EXIF_GPS_DESTDISTANCE        "GPSDestDistance" 
IGMDTAG_NAME_EXIF_GPS_PROCESSINGMETHOD    "GPSProcessingMethod"
IGMDTAG_NAME_EXIF_GPS_AREAINFORMATION     "GPSAreaInformation"
IGMDTAG_NAME_EXIF_GPS_DATESTAMP           "GPSDateStamp"
IGMDTAG_NAME_EXIF_GPS_DIFFERENTIAL        "GPSDifferential"
/* Exif IFD tag names */
IGMDTAG_NAME_EXIF_EXPOSURETIME             "ExposureTime"
IGMDTAG_NAME_EXIF_FNUMBER                  "FNumber"
IGMDTAG_NAME_EXIF_EXPOSUREPROGRAM          "ExposureProgram"
IGMDTAG_NAME_EXIF_SPECTRALSENSITIVITY      "SpectralSensitivity"
IGMDTAG_NAME_EXIF_ISOSPEEDRATING           "ISOSpeedRatings"
IGMDTAG_NAME_EXIF_OECF                     "OECF"
IGMDTAG_NAME_EXIF_VERSION                  "ExifVersion"
IGMDTAG_NAME_EXIF_DATETIMEORIGINAL         "DateTimeOriginal"
IGMDTAG_NAME_EXIF_DATETIMEDIGITIZED        "DateTimeDigitized"
IGMDTAG_NAME_EXIF_COMPONENTCONFIGURATION
"ComponentsConfiguration"
IGMDTAG_NAME_EXIF_COMPRESSEDBITSPERPIXEL
"CompressedBitsPerPixel"
IGMDTAG_NAME_EXIF_SHUTTERSPEEDVALUE        "ShutterSpeedValue"
IGMDTAG_NAME_EXIF_APERTUREVALUE            "ApertureValue"
IGMDTAG_NAME_EXIF_BRIGHTNESSVALUE          "BrightnessValue"
IGMDTAG_NAME_EXIF_EXPOSUREBIASVALUE        "ExposureBiasValue"
IGMDTAG_NAME_EXIF_MAXAPERTUREVALUE         "MaxApertureValue"
IGMDTAG_NAME_EXIF_SUBJECTDISTANCE          "SubjectDistance"
IGMDTAG_NAME_EXIF_MATERINGMODE             "MeteringMode"
IGMDTAG_NAME_EXIF_LIGHTSOURCE              "LightSource"
IGMDTAG_NAME_EXIF_FLASH                    "Flash"
IGMDTAG_NAME_EXIF_FOCALLENGTH              "FocalLength"
IGMDTAG_NAME_EXIF_SUBJECTAREA              "SubjectArea"
IGMDTAG_NAME_EXIF_MAKERNOTE                "MakerNote"
IGMDTAG_NAME_EXIF_USERCOMMENT              "UserComment"
IGMDTAG_NAME_EXIF_SUBSECTIME               "SubSecTime"
IGMDTAG_NAME_EXIF_SUBSECTIMEORIGINAL       "SubSecTimeOriginal"
IGMDTAG_NAME_EXIF_SUBSECTIMEDIGITIZED      "SubSecTimeDigitized"
IGMDTAG_NAME_EXIF_FLASHPIXVERSION          "FlashPixVersion"
IGMDTAG_NAME_EXIF_COLORSPACE               "ColorSpace"
IGMDTAG_NAME_EXIF_PIXELXDIMENSION          "PixelXDimension"
IGMDTAG_NAME_EXIF_PIXELYDIMENSION          "PixelYDimension"
IGMDTAG_NAME_EXIF_RELATEDSOUNDFILE         "RelatedSoundFile"
IGMDTAG_NAME_EXIF_INTEROPERABILITYIFD
"InteroperabilityIFDPointer"
IGMDTAG_NAME_EXIF_FLASHENERGY              "FlashEnergy"
IGMDTAG_NAME_EXIF_SPATIALFREQUENCYRESPONSE
"SpatialFrequencyResponse"
IGMDTAG_NAME_EXIF_FOCALPLANEXRESOLUTION
"FocalPlaneXResolution"
IGMDTAG_NAME_EXIF_FOCALPLANEYRESOLUTION
"FocalPlaneYResolution"
IGMDTAG_NAME_EXIF_FOCALPLANERESOLUTIONUNIT
"FocalPlaneResolutionUnit"
IGMDTAG_NAME_EXIF_SUBJECTLOCATION          "SubjectLocation"
IGMDTAG_NAME_EXIF_EXPOSUREINDEX            "ExposureIndex"
IGMDTAG_NAME_EXIF_SENSINGMETHOD            "SensingMethod"
IGMDTAG_NAME_EXIF_FILESOURCE               "FileSource"
IGMDTAG_NAME_EXIF_SCENETYPE                "SceneType"
IGMDTAG_NAME_EXIF_CFAPATTERN               "CFAPattern"
IGMDTAG_NAME_EXIF_CUSTOMRENDERED           "CustomRendered"
IGMDTAG_NAME_EXIF_EXPOSUREMODE             "ExposureMode"
IGMDTAG_NAME_EXIF_WHITEBALANCE             "WhiteBalance"
IGMDTAG_NAME_EXIF_DIGITALZOOMRATIO         "DigitalZoomRatio"
IGMDTAG_NAME_EXIF_FOCALLENGTHIN35MMFILM
"FocalLengthIn35mmFilm"
IGMDTAG_NAME_EXIF_SCENECAPTURETYPE         "SceneCaptureType"
IGMDTAG_NAME_EXIF_GAINCONTROL              "GainControl"
IGMDTAG_NAME_EXIF_CONTRAST                 "Contrast"
IGMDTAG_NAME_EXIF_SATURATION               "Saturation"
IGMDTAG_NAME_EXIF_SHARPNESS                "Sharpness"
IGMDTAG_NAME_EXIF_DEVICESETTINGDESCRIPTION
"DeviceSettingDescription"
IGMDTAG_NAME_EXIF_SUBJECTDISTANCERANGE
"SubjectDistanceRange"
IGMDTAG_NAME_EXIF_IMAGEUNIQUEID            "ImageUniqueID"
/* Interoperability IFD tag names*/
IGMDTAG_NAME_EXIF_IO_INTEROPERABILITYINDEX
"InteroperabilityIndex" 
IGMDTAG_NAME_EXIF_IO_INTEROPERABILITYVERSION
"InteroperabilityVersion" 
IGMDTAG_NAME_EXIF_IO_RELATEDIMAGEFILEFORMAT
"RelatedImageFileFormat"
IGMDTAG_NAME_EXIF_IO_RELATEDIMAGEWIDTH       "RelatedImageWidth"
IGMDTAG_NAME_EXIF_IO_RELATEDIMAGELENGTH
"RelatedImageLength" 
IGMDTAG_NAME_EXIF_FPX_HEADER                "FPXR_HEADER"
IGMDTAG_NAME_EXIF_FPX_VERSION               "FPXRVersion"
IGMDTAG_NAME_EXIF_FPX_EXTENSIONID           "FPXRExtensionID"
IGMDTAG_NAME_EXIF_FPX_INTEROPERABILITYCOUNT
"FPXRInteroperabilityCount"
IGMDTAG_NAME_EXIF_FPX_INTEROPERABILITY
"InteroperabilityEntity"
IGMDTAG_NAME_EXIF_FPX_ENTITYSIZE            "EntitySize"
IGMDTAG_NAME_EXIF_FPX_DEFAULTVALUE          "DefaultValue"
IGMDTAG_NAME_EXIF_FPX_STORAGE_STREAMNAME    "Storage/
StreamName"
IGMDTAG_NAME_EXIF_FPX_ENTITYCLASSID         "EntityClassID"
IGMDTAG_NAME_EXIF_FPX_INDEXTOCONTENTSLIST
"FPXRIndexToContentsList"
IGMDTAG_NAME_EXIF_FPX_OFFSETTOSTREAM        "FPXROffsetToStream"
IGMDTAG_NAME_EXIF_FPX_STREAMDATA            "FPXRStreamData"
IGMDTAG_NAME_EXIF_FPX_RESERVEDDATA          "FPXRData"
 IGMDTAG_ID_EXIF_JPEG_FORMAT              = IG_FORMAT_EXIF_JPEG,
 IGMDTAG_ID_EXIF_TIFF_FORMAT              = IG_FORMAT_EXIF_TIFF,
 IGMDTAG_ID_EXIF_EXPOSURETIME             = 33434,
 IGMDTAG_ID_EXIF_FNUMBER                  = 33437,
 IGMDTAG_ID_EXIF_EXPOSUREPROGRAM          = 34850,
 IGMDTAG_ID_EXIF_SPECTRALSENSITIVITY      = 34852,
 IGMDTAG_ID_EXIF_ISOSPEEDRATING           = 34855,
 IGMDTAG_ID_EXIF_OECF                     = 34856,
 IGMDTAG_ID_EXIF_VERSION                  = 36864,
 IGMDTAG_ID_EXIF_DATETIMEORIGINAL         = 36867,
 IGMDTAG_ID_EXIF_DATETIMEDIGITIZED        = 36868,
 IGMDTAG_ID_EXIF_COMPONENTCONFIGURATION   = 37121,
 IGMDTAG_ID_EXIF_COMPRESSEDBITSPERPIXEL   = 37122,
 IGMDTAG_ID_EXIF_SHUTTERSPEEDVALUE        = 37377,
 IGMDTAG_ID_EXIF_APERTUREVALUE            = 37378,
 IGMDTAG_ID_EXIF_BRIGHTNESSVALUE          = 37379,
 IGMDTAG_ID_EXIF_EXPOSUREBIASVALUE        = 37380,
 IGMDTAG_ID_EXIF_MAXAPERTUREVALUE         = 37381,
 IGMDTAG_ID_EXIF_SUBJECTDISTANCE          = 37382,
 IGMDTAG_ID_EXIF_MATERINGMODE             = 37383,
 IGMDTAG_ID_EXIF_LIGHTSOURCE              = 37384,
 IGMDTAG_ID_EXIF_FLASH                    = 37385,
 IGMDTAG_ID_EXIF_FOCALLENGTH              = 37386,
 IGMDTAG_ID_EXIF_SUBJECTAREA              = 37396,
 IGMDTAG_ID_EXIF_MAKERNOTE                = 37500,
 IGMDTAG_ID_EXIF_USERCOMMENT              = 37510,
 IGMDTAG_ID_EXIF_SUBSECTIME               = 37520,
 IGMDTAG_ID_EXIF_SUBSECTIMEORIGINAL       = 37521,
 IGMDTAG_ID_EXIF_SUBSECTIMEDIGITIZED      = 37522,
 IGMDTAG_ID_EXIF_FLASHPIXVERSION          = 40960,
 IGMDTAG_ID_EXIF_COLORSPACE               = 40961,
 IGMDTAG_ID_EXIF_PIXELXDIMENSION          = 40962,
 IGMDTAG_ID_EXIF_PIXELYDIMENSION          = 40963,
 IGMDTAG_ID_EXIF_RELATEDSOUNDFILE         = 40964,
 IGMDTAG_ID_EXIF_INTEROPERABILITYIFD      = 40965,
 IGMDTAG_ID_EXIF_FLASHENERGY              = 41483,
 IGMDTAG_ID_EXIF_SPATIALFREQUENCYRESPONSE = 41484,
 IGMDTAG_ID_EXIF_FOCALPLANEXRESOLUTION    = 41486,
 IGMDTAG_ID_EXIF_FOCALPLANEYRESOLUTION    = 41487,
 IGMDTAG_ID_EXIF_FOCALPLANERESOLUTIONUNIT = 41488,
 IGMDTAG_ID_EXIF_SUBJECTLOCATION          = 41492,
 IGMDTAG_ID_EXIF_EXPOSUREINDEX            = 41493,
 IGMDTAG_ID_EXIF_SENSINGMETHOD            = 41495,
 IGMDTAG_ID_EXIF_FILESOURCE               = 41728,
 IGMDTAG_ID_EXIF_SCENETYPE                = 41729,
 IGMDTAG_ID_EXIF_CFAPATTERN               = 41730,
 IGMDTAG_ID_EXIF_CUSTOMRENDERED           = 41985, 
 IGMDTAG_ID_EXIF_EXPOSUREMODE             = 41986, 
 IGMDTAG_ID_EXIF_WHITEBALANCE             = 41987, 
 IGMDTAG_ID_EXIF_DIGITALZOOMRATIO         = 41988, 
 IGMDTAG_ID_EXIF_FOCALLENGTHIN35MMFILM    = 41989, 
 IGMDTAG_ID_EXIF_SCENECAPTURETYPE         = 41990, 
 IGMDTAG_ID_EXIF_GAINCONTROL              = 41991, 
 IGMDTAG_ID_EXIF_CONTRAST                 = 41992, 
 IGMDTAG_ID_EXIF_SATURATION               = 41993, 
 IGMDTAG_ID_EXIF_SHARPNESS                = 41994, 
 IGMDTAG_ID_EXIF_DEVICESETTINGDESCRIPTION = 41995, 
 IGMDTAG_ID_EXIF_SUBJECTDISTANCERANGE     = 41996, 
 IGMDTAG_ID_EXIF_IMAGEUNIQUEID            = 42016, 
 IGMDTAG_ID_EXIF_HEADER                   = 59935
 IGMDTAG_ID_EXIF_GPS_VERSIONID            = 0,
 IGMDTAG_ID_EXIF_GPS_LATITUDEREF          = 1,
 IGMDTAG_ID_EXIF_GPS_LATITUDE             = 2,
 IGMDTAG_ID_EXIF_GPS_LONGITUDEREF         = 3,
 IGMDTAG_ID_EXIF_GPS_LONGITUDE            = 4,
 IGMDTAG_ID_EXIF_GPS_ALTITUDEREF          = 5,
 IGMDTAG_ID_EXIF_GPS_ALTITUDE             = 6,
 IGMDTAG_ID_EXIF_GPS_TIMESTAMP            = 7,
 IGMDTAG_ID_EXIF_GPS_SATELLITES           = 8,
 IGMDTAG_ID_EXIF_GPS_STATUS               = 9,
 IGMDTAG_ID_EXIF_GPS_MEASUREMODE          = 10,
 IGMDTAG_ID_EXIF_GPS_DOP                  = 11,
 IGMDTAG_ID_EXIF_GPS_SPEEDREF             = 12,
 IGMDTAG_ID_EXIF_GPS_SPEED                = 13,
 IGMDTAG_ID_EXIF_GPS_TRACKREF             = 14,
 IGMDTAG_ID_EXIF_GPS_TRAK                 = 15,
 IGMDTAG_ID_EXIF_GPS_IMGDIRECTIONREF      = 16,
 IGMDTAG_ID_EXIF_GPS_IMGDIRECTION         = 17,
 IGMDTAG_ID_EXIF_GPS_MAPDATUM             = 18,
 IGMDTAG_ID_EXIF_GPS_DESTLATITUDEREF      = 19,
 IGMDTAG_ID_EXIF_GPS_DESTLATITUDE         = 20,
 IGMDTAG_ID_EXIF_GPS_DESTLONGITUDEREF     = 21,
 IGMDTAG_ID_EXIF_GPS_DESTLONGITUDE        = 22,
 IGMDTAG_ID_EXIF_GPS_DESTBEARINGREF       = 23,
 IGMDTAG_ID_EXIF_GPS_DESTBEARING          = 24,
 IGMDTAG_ID_EXIF_GPS_DESTDISTANCEREF      = 25,
 IGMDTAG_ID_EXIF_GPS_DESTDISTANCE         = 26,
 IGMDTAG_ID_EXIF_GPS_PROCESSINGMETHOD     = 27,
 IGMDTAG_ID_EXIF_GPS_AREAINFORMATION      = 28,
 IGMDTAG_ID_EXIF_GPS_DATESTAMP            = 29,
 IGMDTAG_ID_EXIF_GPS_DIFFERENTIAL         = 30
 IGMDTAG_ID_EXIF_IO_INTEROPERABILITYINDEX    = 1,
 IGMDTAG_ID_EXIF_IO_INTEROPERABILITYVERSION  = 2,
 IGMDTAG_ID_EXIF_IO_RELATEDIMAGEFILEFORMAT   = 4096,
 IGMDTAG_ID_EXIF_IO_RELATEDIMAGEWIDTH        = 4097,
 IGMDTAG_ID_EXIF_IO_RELATEDIMAGELENGTH       = 4098
 IGMDTAG_ID_EXIF_FPX_HEADER                  = 61221,
 IGMDTAG_ID_EXIF_FPX_VERSION                 = 61222,
 IGMDTAG_ID_EXIF_FPX_EXTENSIONID             = 61223,
 IGMDTAG_ID_EXIF_FPX_INTEROPERABILITYCOUNT   = 61224,
 IGMDTAG_ID_EXIF_FPX_INDEXTOCONTENTSLIST     = 61225,
 IGMDTAG_ID_EXIF_FPX_OFFSETTOSTREAM          = 61226,
 IGMDTAG_ID_EXIF_FPX_STREAMDATA              = 61227,
 IGMDTAG_ID_EXIF_FPX_RESERVEDDATA            = 61228