We need a versioning story

See, for example,

  http://lists.w3.org/Archives/Public/public-xml-processing-model-comments/2007Jun/0000.html

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | Everything should be made as simple as
http://nwalsh.com/            | possible, but no simpler.