hello

in my schema I have an attribute (lets call it attr) in one of my elements. (it is not the only attribute in this element). for example:
<data class="instance" attr="AAA">
is there a way to write that if my class is intance(like in the example), so the attr attribute is not required, other wise it is required to all other data elements?

thanks

kfir

__________________
kfir

You're looking for what's called "co-occurrence constraints": it's a well known limitation of XML Schema 1.0 that you can't do this.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

so I can not write the limitation?


kfir