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<?xml version="1.0"?>
<doc xmlns:xi="http://www.w3.org/2003/XInclude" xml:base="one/two">
<elem xml:base="http://example.org/one/two">
        http://example.org/one/two
    </elem><elem xml:base="../../ents/one/two2">
        ents/one/two2
    </elem><elem xml:base="../../ents/one2/two">
        ents/one2/two
    </elem><elem xml:base="two/three/four">
        docs/one/two/three/four
    </elem>
</doc>