<grammar xmlns=“relaxng.org/ns/structure/1.0” datatypeLibrary=“www.w3.org/2001/XMLSchema-datatypes”>
<define name="position"> <element ns="http://cpee.org/ns/properties/2.0"> <anyName/> <optional> <attribute name="passthrough"> <data type="string"/> </attribute> </optional> <data type="string"> <param name="pattern">(at|after)</param> </data> </element> </define>
</grammar>