problems in XPath selecting with namespaces and Predicates.

If namespaces and Predicates are used simultaneously, an element cannot be taken out correctly.

example

target XML Document is :

<?xml version="1.0"?>
<doc xmlns:ext="http://somebody.elses.extension">
<ext:a test="test" />
<b attr1="a1" attr2="a2"
xmlns:java="http://xml.apache.org/xslt/java">
<a>
</a>
</b>
</doc>

XPath:
declare namespace ext='http://somebody.elses.extension'$this//ext:a[@test='test']