urn:x-ul:

urn:x-ul:

例

[1] urn:x-ul:060E2B34.0401.0101.04020202.03020500

Ontology for Media Resources 1.0 (2012-02-07 07:39:04 +09:00 版) <http://www.w3.org/TR/2012/REC-mediaont-10-20120209/#compression-property-examples>