http://www.rfc-editor.org/rfc/rfc6893.txt
RFC 6893: A Uniform Resource Name (URN) Namespace for the Open IPTV Forum (OIPF), P. Higgs, P. Szucs2013-03-01T23:00:00-00:00This document describes a Uniform Resource Name (URN) namespace for the Open IPTV Forum (OIPF) for naming persistent resources defined within OIPF specifications. Example resources include technical documents and specifications, eXtensible Markup Language (XML) schemas, classification schemes, XML Document Type Definitions (DTDs), namespaces, style sheets, media assets, and other types of resources produced or managed by the OIPF.