[tei-council] odds.xml

A recent posting on tei-l reminded me of the existence of a rather nice introduction to ODD which is on the TEI web site at http://www.tei-c.org/Guidelines/Customization/odds.xml Does anyone know where the source for this document is, and who maintains it? Good as it is, it needs updating in light of the existence of pure ODD. Specifically it should make clear that you don't have to define content models in RELAX NG.