80 September 2005 XMP Specification XMP Schemas Property Value Types 4 ResourceRef A multiple part reference to a resource. Used to indicate prior versions, originals of renditions, originals for derived documents, and so on. The fields present in any specific reference depend on usage and on whether the referenced resource is managed. Except for instanceID, the fields are all properties from the referenced resource’s xmpMM schema. ● The field namespace URI is http://ns.adobe.com/xap/1.0/sType/ResourceRef# ● The preferred field namespace prefix is stRef Version Describes one version of a document. ● The field namespace URI is http://ns.adobe.com/xap/1.0/sType/Version# ● The preferred field namespace prefix is stVer Field Name Value Type Description instanceID URI The referenced resource’s instance ID. documentID URI The referenced resource’s xmpMM:DocumentID. versionID Text The referenced resource’s xmpMM:VersionID. renditionClass RenditionClass The referenced resource’s xmpMM: RenditionClass. renditionParams Text The referenced resource’s xmpMM: RenditionParams. manager AgentName The referenced resource’s xmpMM:Manager. managerVariant Text The referenced resource’s xmpMM: ManagerVariant. manageTo URI The referenced resource’s xmpMM:ManageTo. manageUI URI The referenced resource’s xmpMM:ManageUI. Field Name Value Type Description comments Text Comments concerning what was changed. event ResourceEvent High level, formal description of what operation the user performed. modifyDate Date The date on which this version was checked in. modifier ProperName The person who modified this version. version Text The new version number.