(2013-10-10) Bernard Vatant: Stable, as everything in W3C namespace, but does not seem to have been used either by data or other vocabularies.
(2014-11-05) Ghislain Atemezing: This vocabulary still need to be re-published using recent best practices.
(2012-01-06) Bernard Vatant: Another vocabulary published around 2004 by the W3C Semantic Web Activity group on Named Graphs, once again without metadata.
