xml/tests/testData/xml/Substitute/prefixed.xml

<a:root xmlns:a="http://test/a"
      xmlns:b="http://test/b"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://test/b schema-b.xsd">

    <b:instance id=""/>
</a:root>