•Schematron
is very useful for "plugging the gaps" in XML Schema
•Use to
express constraints over and above those allowed in Schematron
•Schematron
schemas contain patterns
•Patterns
are named and contain rules
•Rules have a
context and contain assertions and
reports
•Assertions
and reports have tests and contain descriptions
or error messages
•Schematron
patterns can be embedded in XML
Schema schemas