40 September 2005 XMP Specification XMP Schemas XMP Basic Schema 4 XMP Basic Schema The XMP Basic Schema contains properties that provide basic descriptive information. ● The schema namespace URI is http://ns.adobe.com/xap/1.0/ ● The preferred schema namespace prefix is xmp Property Value Type Category Description xmp:Advisory bag XPath External An unordered array specifying properties that were edited outside the authoring application. Each item should contain a single namespace and XPath separated by one ASCII space (U+0020). xmp:BaseURL URL Internal The base URL for relative URLs in the document content. If this document contains Internet links, and those links are relative, they are relative to this base URL. This property provides a standard way for embedded relative URLs to be interpreted by tools. Web authoring tools should set the value based on their notion of where URLs will be interpreted. xmp:CreateDate Date Internal The date and time the resource was originally created. xmp:CreatorTool AgentName Internal The name of the first known tool used to create the resource. If history is present in the metadata, this value should be equivalent to that of xmpMM:History’s softwareAgent property. xmp:Identifier bag Text External An unordered array of text strings that unambiguously identify the resource within a given context. An array item may be qualified with xmpidq:Scheme to denote the formal identification system to which that identifier conforms. NOTE: The dc:identifier property is not used because it lacks a defined scheme qualifier and has been defined in the XMP Specification as a simple (single-valued) property. xmp:Label Text External A word or short phrase that identifies a document as a member of a user-defined collection. Used to organize documents in a file browser. xmp:MetadataDate Date Internal The date and time that any metadata for this resource was last changed. It should be the same as or more recent than xmp:ModifyDate.