XMP Specification September 2005 59 XMP Schemas EXIF Schemas 4 EXIF Schemas EXIF is a metadata standard for image files, used widely by digital cameras. The EXIF 2.2 specification can be found at http://www.exif.org/specifications.html. There are two XMP schemas that correspond to parts of the EXIF 2.2 specification, described in the following sections: ● “EXIF Schema for TIFF Properties” on page 58 ● “EXIF Schema for EXIF-specific Properties” on page 60 ● “EXIF Schema for Additional EXIF Properties” on page 69 describes a namespace that defines additional properties for the equipment used to produce EXIF data. The property descriptions assume that the reader has some familiarity with EXIF metadata. The XMP property names are identical to the names used within the EXIF specification more complete descriptions of the properties can be found in the specification. The following sections provide further information: ● “Data Representation and Conversion” on page 69 describes guidelines for converting between the XMP and EXIF formats, with examples. ● “EXIF Schema Value Types” on page 83 describes EXIF-specific value types. NOTE: XMP properties of type Date include fractional seconds therefore EXIF properties for fractional seconds (SubSecTime, SubSecTimeOriginal, SubSecTimeDigitized) are included in the “main XMP property”. EXIF Schema for TIFF Properties The following table lists the properties for TIFF-derived data. Only those TIFF properties that are mentioned in the EXIF 2.2 specification are included here. ● The schema name is http://ns.adobe.com/tiff/1.0/ ● The preferred schema namespace prefix is tiff Property Value Type Category Description tiff:ImageWidth Integer Internal TIFF tag 256, 0x100. Image width in pixels. tiff:ImageLength Integer Internal TIFF tag 257, 0x101. Image height in pixels. tiff:BitsPerSample seq Integer Internal TIFF tag 258, 0x102. Number of bits per component in each channel. tiff:Compression Closed Choice of Integer Internal TIFF tag 259, 0x103. Compression scheme:1 = uncompressed 6 = JPEG.