This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
in http://lists.w3.org/Archives/Public/www-xml-schema-comments/2007AprJun/0043.html Michael Hedenus (<Michael.Hedenus.ext@siemensvdo.com) proposes an alternative language based on URIs for datatypes to defined some (possibly all?) derived datatypes. I cannot find any indication that this has been acted on by the WG, which needs to do so.
2007-08-17 telcon <ht> MSM: We should say we accept the goal, and think the proposed mechanism is ingenious, but isn't complete (unions, complex types) and doesn't offer enough benefits over SCDs to be proposed right now The WG thinks that this is an ingenious solution, but declines to make the change to this version of datatypes.
A message to the original contributor was sent 27 Sep. http://lists.w3.org/Archives/Public/www-xml-schema-comments/2007JulSep/0197.html