<?xml version="1.0"?>
<r:data xmlns:r="http://www.r-project.org"
        xmlns:xi="http://www.w3.org/2001/XInclude">
<r:var name="x"><r:integer id="1" length="10">1 2 3 4 5 6 7 8 9 10</r:integer></r:var>
<r:var name="y"><xi:include xpointer="xmlns(r=http://www.r-project.org) xpointer(//r:var[@name='x']/r:integer)"/></r:var>
</r:data>
