(2014-11-05) Ghislain Atemezing: The vocabulary still need to be published using recent best practices.
(2013-10-09) Bernard Vatant: Will be as stable as any other vocabulary in W3C namespace. Reused by 6 other vocabularies. Added provisional date at end of 2004.
(2012-01-06) Bernard Vatant: This very small vocabulary was developed around 2004 in the W3C Semantic Web Activity by a group dedicated to named Graphs. Unfortunately the vocabulary file itself contains no metadata.