1<?xml version="1.0"?>
2<!DOCTYPE a:outer [
3<!ELEMENT a:outer (a:inner)>
4<!ATTLIST a:outer xmlns:a CDATA #FIXED "urn:namespace">
5<!ELEMENT a:inner EMPTY>
6<!ATTLIST a:inner xmlns:a CDATA #FIXED "urn:namespace">
7<!ATTLIST a:inner attr CDATA #FIXED "yes">
8]>
9<a:outer xmlns:a="urn:namespace">
10  <a:inner/>
11</a:outer>
12