<?xml version="1.0" ?>
<app:categories xmlns:app="http://www.w3.org/2007/app"
	xmlns:atom="http://www.w3.org/2005/Atom" fixed="yes"
	scheme="http://example.com/cats/big3">
	<atom:category term="animal" />
	<atom:category term="vegetable" />
	<atom:category term="mineral" />
</app:categories>