<?xml version=“1.0”?> <grammar xmlns=“relaxng.org/ns/structure/1.0”>
<start> <element name="test" ns="http://example.com/1/"> <zeroOrMore> <attribute> <choice> <nsName ns="http://example.com/1/"/> <nsName ns="http://example.com/2/"/> </choice> <text/> </attribute> </zeroOrMore> </element> </start>
</grammar>