<?xml version="1.0"?>
<Foo
xmlns="urn:test:foo"
xmlns:foo="urn:test:foo"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:test:foo idc-keyref_1.xsd">
<Def>
<Link foo:linkKey="L4"/>
</Def>
<Ref foo:linkRef="L4"/>
</Foo>