XMP Specification September 2005 41 XMP Schemas XMP Basic Schema 4 An item in the xmp:Identifier array may be qualified with xmpidq:Scheme to denote the formal identification system to which that identifier conforms. ● The qualifier namespace URI is http://ns.adobe.com/xmp/Identifier/qual/1.0/ ● The preferred qualifier namespace prefix is xmpidq xmp:ModifyDate Date Internal The date and time the resource was last modified. NOTE: The value of this property is not necessarily the same as the file’s system modification date because it is set before the file is saved. xmp:Nickname Text External A short informal name for the resource. xmp:Rating Closed Choice of Integer External A number that indicates a document’s status relative to other documents, used to organize documents in a file browser. Values are user-defined within an application- defined range. xmp:Thumbnails alt Thumbnail Internal An alternative array of thumbnail images for a file, which can differ in characteristics such as size or image encoding. Qualifier Value Type Category Description xmpidq:Scheme Text External The name of the formal identification system used in the value of the associated xmp:Identifier item. Property Value Type Category Description