<schema xmlns=“www.ascc.net/xml/schematron” >
<pattern name="Test count"> <rule context="/*"> <report test="count(//BBB) = count(//AAA)">O.K.</report> <assert test="count(//BBB) <= count(//AAA)">Some AAA are missing</assert> <report test="count(//BBB) < count(//AAA)">Some BBB are missing</report> </rule> </pattern>
</schema>