Enforce further constraints on xsd:any?

Question

I have an XSD 1.0 sequence that defines a set of elements, some of which may be optional but none of which can occur more than once, and which also ends with an

Answer 1

No, in XSD 1.0, once you've allowed any element, you can't specify further constraints beyond those afforded by minOccurs, maxOccurs, namespace, and processContents.

In XSD 1.1, you can also make xsd:assertions against the xsd:any elements; you'd be able to express your constraint with an assertion. [Update: Don't miss @C. M. Sperberg-McQueen's simpler idea for XSD 1.1: xsd:any/@notQName="itemA itemB itemC"]

Answer 2

Perhaps the simplest way to ensure that the elements itemA, itemB, and itemC are not repeated is to use namespace="##other" instead of namespace="##any". (This assumes that elements in the namespace testxsd other than those three will not need to appear here.)

Or move to XSD 1.1 and add the attribute notQName="itemA itemB itemC".