1<?xml version="1.0"?> 2<element name="foo" 3 xmlns="http://relaxng.org/ns/structure/1.0" 4 xmlns:a="http://relaxng.org/ns/annotation/1.0" 5 xmlns:ex1="http://www.example.com/n1" 6 xmlns:ex2="http://www.example.com/n2"> 7 <a:documentation>A foo element.</a:documentation> 8 <element name="ex1:bar1"> 9 <empty/> 10 </element> 11 <element name="ex2:bar2"> 12 <empty/> 13 </element> 14</element> 15