<?xml version="1.0"?>
<XPath xmlns:bar="http://example.org/bar" xmlns:baz="http://example.org/baz" xmlns:foo="http://example.org/foo" xml:lang="en-ie">
    (//. | //@* | //namespace::*) 
    [ 
              <!-- only directly-used namespace nodes -->
              ancestor-or-self::bar:Something  and
              (string(self::node()) = namespace-uri(parent::node()))
    ]
</XPath>