History

1.1draft
Current recommanded version since 2009. Existent modules are stabilized, and new modules appear: hierarchy and phylogeny.
1.0
Official specification produced in DTD during the year 2007. Basic topology, associated data and dynamics attempt constitute the core, plus a visualization extension. This version is now deprecated.

Why a draft?

New versions follow 3 steps : proposal, draft and official specification. Some parts of the current format still require a "fire-proof testing" in an industrial context.