Workaround for xinclude path bug, fixed in xsltproc 1.1.27?

Take these three files:

foo.dbx:

    <?xml version="1.0" encoding='UTF-8'?>
    <!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook V4.2//EN"
        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

    <article>
      <title>Test</title>

      <xi:include href="bar.dbx"
        xmlns:xi="http://www.w3.org/2001/XInclude"/>
    </article>

bar/bar.dbx:

    <?xml version="1.0" encoding='UTF-8'?>
    <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook V4.2//EN"
        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

    <sect1>
      <title>Article Section 1</title>

      <para>
        <xi:include href="qux.txt" parse="text"
          xmlns:xi="http://www.w3.org/2001/XInclude"/>
      </para>
    </sect1>

and qux.txt:

    Hi, I am the article's real text.