XrML and Standards
In March 2002, Hari Reddy of ContentGuard became chair of a new OASIS technical committee on rights languages. In a meeting on May 21, ContentGuard appears to have presented a new version of XrML, 2.1, as the starting point for the committee's work. The group disbanded later in that year, unable to agree on a direction for the work. ContentGuard was also working with the Electronic Book Exchange (EBX) in 2000, and later the Open eBook Forum (OeBF), on the development of standards for digital rights management for eBooks. In 2003, the OeBF "Rights and Rules" working group developed a draft standard rights expression language based on XrML 2.0, however this standards effort halted and has not been revived at this writing.
At this same time, ContentGuard was participating in the MPEG-21 standards committee, where XrML was proposed as the basis for Part 5 of the MPEG-21 standard (ISO/IEC 21000), the Rights Expression Language. Through a member vote of the International Organization for Standardization, the MPEG-21 standard, including Part 5, became an official international standard. ContentGuard ceased work on XrML at the point that it became adopted as an official standard; ISO/IEC 21000-5 is its current manifestation.
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