test/schemas/allsg_5.xml

<?xml version="1.0"?>
<foo xmlns="urn:test:foo" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="urn:test:foo sg-all.xsd">
	<gm-B-1/>
	<gm-A-2/>	
	<gm-B-2/>
</foo>