[SOLVED] How to improve XSD for a list with differently typed items + multiplicity and uniqueness constraints

Selon Boris Kolpackov <boris@codesynthesis.com>:

> Yes, you can do this with substitution groups and uniqueness constraints.

Boris, Michael,

Thanks!

Substitution groups and uniqueness constraints did the trick!
(using XSD 1.1 assertions is not an option to me)

Grégoire