XrML is the eXtensible Rights Markup Language which has also been standardized as the Rights Expression Language (REL) for MPEG-21. XrML is owned by ContentGuard. XrML is based on XML and describes rights, fees and conditions together with message integrity and entity authentication information. ==History and Development== ===Xerox PARC and DPRL==...
Found on
http://en.wikipedia.org/wiki/XrML
the eXtensible Rights Markup Language, or the Rights Expression Language (REL) for MPEG-21.
Found on
https://en.wikipedia.org/wiki/List_of_XML_markup_languages
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