1<?xml version="1.0"?> 2<Foo 3 xmlns="urn:test:foo" 4 xmlns:foo="urn:test:foo" 5 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 6 xsi:schemaLocation="urn:test:foo idc-keyref_1.xsd"> 7 8 <Def> 9 <Link foo:linkKey="L4"/> 10 </Def> 11 12 <Ref foo:linkRef="L4"/> 13 14</Foo>