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>