The XMP Media Management Schema is primarily for use by digital asset management (DAM) systems.

The following XMP properties are "owned" by the DAM system and should be set by applications under their direction; they should not be used by unmanaged files: xmpMM:ManagedFrom, xmpMM:Manager, xmpMM:ManageTo, xmpMM:ManageUI, xmpMM:ManagerVariant.

The following properties are owned by the DAM system for managed files, but can also be used by applications for unmanaged files: xmpMM:DerivedFrom, xmpMM:DocumentID, xmpMM:RenditionClass, xmpMM:RenditionParams, xmpMM:VersionID, xmpMM:Versions.

The xmpMM:History property is always owned by the application.

• Exiv2 keys are Xmp.xmpMM.<Property>
• The schema namespace URI is http://ns.adobe.com/xap/1.0/mm/
• The preferred schema namespace prefix is xmpMM

Reference: XMP Specification and Documentation

Property	Label	Value type	Exiv2 type	Category	Description
DerivedFrom	Derived From	ResourceRef	XmpText	Internal	A reference to the original document from which this one is derived. It is a minimal reference; missing components can be assumed to be unchanged. For example, a new version might only need to specify the instance ID and version number of the previous version, or a rendition might only need to specify the instance ID and rendition class of the original.
DocumentID	Document ID	URI	XmpText	Internal	The common identifier for all versions and renditions of a document. It should be based on a UUID; see Document and Instance IDs below.
History	History	seq ResourceEvent	XmpSeq	Internal	An ordered array of high-level user actions that resulted in this resource. It is intended to give human readers a general indication of the steps taken to make the changes from the previous version to this one. The list should be at an abstract level; it is not intended to be an exhaustive keystroke or other detailed history.
Ingredients	Ingredients	bag ResourceRef	XmpBag	Internal	References to resources that were incorporated, by inclusion or reference, into this resource.
InstanceID	Instance ID	URI	XmpText	Internal	An identifier for a specific incarnation of a document, updated each time a file is saved. It should be based on a UUID; see Document and Instance IDs below.
ManagedFrom	Managed From	ResourceRef	XmpText	Internal	A reference to the document as it was prior to becoming managed. It is set when a managed document is introduced to an asset management system that does not currently own it. It may or may not include references to different management systems.
Manager	Manager	AgentName	XmpText	Internal	The name of the asset management system that manages this resource. Along with xmpMM: ManagerVariant, it tells applications which asset management system to contact concerning this document.
ManageTo	Manage To	URI	XmpText	Internal	A URI identifying the managed resource to the asset management system; the presence of this property is the formal indication that this resource is managed. The form and content of this URI is private to the asset management system.
ManageUI	Manage UI	URI	XmpText	Internal	A URI that can be used to access information about the managed resource through a web browser. It might require a custom browser plug-in.
ManagerVariant	Manager Variant	Text	XmpText	Internal	Specifies a particular variant of the asset management system. The format of this property is private to the specific asset management system.
OriginalDocumentID	Original Document ID	URI	XmpText	Internal	Refer to Part 1, Data Model, Serialization, and Core Properties, for definition.
Pantry	Pantry	bag struct	XmpText	Internal	Each array item has a structure value with a potentially unique set of fields, containing extracted XMP from a component. Each field is a property from the XMP of a contained resource component, with all substructure preserved. Each pantry entry shall contain an xmpMM:InstanceID. Only one copy of the pantry entry for any given xmpMM:InstanceID shall be retained in the pantry. Nested pantry items shall be removed from the individual pantry item and promoted to the top level of the pantry.
RenditionClass	Rendition Class	RenditionClass	XmpText	Internal	The rendition class name for this resource. This property should be absent or set to default for a document version that is not a derived rendition.
RenditionParams	Rendition Params	Text	XmpText	Internal	Can be used to provide additional rendition parameters that are too complex or verbose to encode in xmpMM: RenditionClass.
VersionID	Version ID	Text	XmpText	Internal	The document version identifier for this resource. Each version of a document gets a new identifier, usually simply by incrementing integers 1, 2, 3 . . . and so on. Media management systems can have other conventions or support branching which requires a more complex scheme.
Versions	Versions	seq Version	XmpText	Internal	The version history associated with this resource. Entry [1] is the oldest known version for this document, entry [last()] is the most recent version. Typically, a media management system would fill in the version information in the metadata on check-in. It is not guaranteed that a complete history versions from the first to this one will be present in the xmpMM:Versions property. Interior version information can be compressed or eliminated and the version history can be truncated at some point.
LastURL	Last URL	URL	XmpText	Internal	Deprecated for privacy protection.
RenditionOf	Rendition Of	ResourceRef	XmpText	Internal	Deprecated in favor of xmpMM:DerivedFrom. A reference to the document of which this is a rendition.
SaveID	Save ID	Integer	XmpText	Internal	Deprecated. Previously used only to support the xmpMM:LastURL property.