XML and Versioning

Noah Mendelsohn posted the following to the www-tag list.

http://lists.w3.org/Archives/Public/www-tag/2004Aug/0004.html

The discussion in the attachment to this email 
takes up the particularly difficult problem 
of versioning in XML Schemas.   Versioning is 
a tough problem for any evolving system as 
a version of a schema is analogous to an allele 
in a biological system.   If any of you have 
time to review Noah's submission, it is an 
excellent thread topic to expose to a wider 
audience.

len