Qualified Dublin Core XMP properties are used under Darwin Core.

• Exiv2 keys are nested: Xmp.dwc.Record/dcterms:<Property>
• The schema namespace URI is http://purl.org/dc/terms/
• The schema namespace prefix dcterms is only used for DwC Location properties: Xmp.dcterms.Location/dwc:<Property>

Reference: DCMI Metadata Terms

Property	Label	Value type	Exiv2 type	Category	Description
type	Type	bag open Choice	XmpBag	External	The nature or genre of the resource.
modified	Date Modified	seq Date	XmpSeq	External	Date on which the resource was changed.
language	Language	bag Locale	XmpBag	External	A language of the resource.
license	License	Lang Alt	LangAlt	External	A legal document giving official permission to do something with the resource.
rightsHolder	Rights Holder	seq ProperName	XmpSeq	External	A person or organization owning or managing rights over the resource.
accessRights	Access Rights	Lang Alt	LangAlt	External	Information about who can access the resource or an indication of its security status.
bibliographicCitation	Bibliographic Citation	Text	XmpText	External	A bibliographic reference for the resource.
references	References	bag Text	XmpBag	External	A related resource that is referenced, cited, or otherwise pointed to by the described resource.
Location	Location	Location	XmpText	Internal	*Main structure* containing Darwin Core location based information.