11-Aug-02
XML Schema: Schematron
2
Co-occurrence
Constraints
•XML Schema
can't articulate certain kinds of constraints:
•When an
element's type depends on an attribute value
•When an
element's content depends on the presence
of an attribute
•When the
text in mixed content has to be a certain type
•When a
value has to match an ID in a separate document
•When an
element can contain repeatable elements in any order
•Schematron
can be used to plug the gaps