<article
	 xmlns:xi="http://www.w3.org/2003/XInclude"
	 xmlns:r="http://www.r-project.org">
<title>This is the title</title>

<section>
<xi:include xpointer="xpointer(//title)"/>

<para>
This section should have the same title as the article.
</para>
<para>
<xi:include xpointer="xmlns(r=http://www.r-project.org)xpointer(//r:code[@id='foo'])"/>

<r:code>
<xi:include xpointer="xmlns(r=http://www.r-project.org)xpointer(//r:code[@id='foo']/text())"/>
y = 10*x + 3 + rnorm(length(x))
</r:code>
</para>
</section>


<r:code id="foo">
x = 1:10
</r:code>
</article>