74 September 2005 XMP Specification XMP Schemas Property Value Types 4 Property Value Types The following tables list the value types used in the XMP schemas. Basic Value Types Boolean Allowed values are True or False (the strings should be spelled exactly as shown). Choice A value chosen from a vocabulary of values, and represented by a string. Vocabularies provide a means of specifying a limited but extensible set of values for a property. The metadata schema can indicate whether the set of legal values is fixed or can be extended. A choice can be open or closed: ● An open choice has one or more lists of preferred values, but other values can be freely used. ● A closed choice only allows values from the defined lists. If a property value is to have a very definite meaning and all users of that property must know the exact meaning, use a closed choice vocabulary. If there are well-defined sets of values whose meanings are known, but additional values might be used without causing problems, use an open choice. Colorant A structure containing the characteristics of a colorant (swatch) used in a document. ● The field namespace URI is http://ns.adobe.com/xap/1.0/g/ ● The preferred field namespace prefix is xapG Field Name Value Type Description xapG:swatchName Text Name of the swatch. xapG:mode closed Choice The color space in which the color is defined. One of: CMYK,RGB,LAB. Library colors are represented in the color space for which they are defined. xapG:type closed Choice The type of color, one of PROCESS or SPOT. xapG:cyan Real Cyan value when the mode is CMYK. Range 0-100. xapG:magenta Real Magenta value when the mode is CMYK. Range 0-100. xapG:yellow Real Yellow value when the mode is CMYK. Range 0-100.