1<?xml version="1.0"?> 2<grammar xmlns="http://relaxng.org/ns/structure/1.0"> 3 <start> 4 <element name="test" ns="http://example.com/1/"> 5 <zeroOrMore> 6 <attribute> 7 <choice> 8 <nsName ns="http://example.com/1/"/> 9 <nsName ns="http://example.com/2/"/> 10 </choice> 11 <text/> 12 </attribute> 13 </zeroOrMore> 14 </element> 15 </start> 16</grammar> 17