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