Alternative versions of an element within one schema

I'm trying to find a way to handle multiple versions of an element
definition within a single schema.  I keep running into UPA problems
(among others) so I was wondering if anyone has solved this problem.

I want to allow a single schema to validate instance documents like

  <a version="1.0">
    ... some complex content


  <a version="2.0">
    ... complex content but different from version 1.0 in some way

I have tried defining two groups, a10 and a20, that each have a fixed
value of attribute version.  These are then listed in the schema under
<root> within a choice element.

How can I make this work?  It seems as if it is an important situation.



Received on Thursday, 21 February 2002 13:40:40 UTC