<?xml version=“1.0”?> <XPath xmlns:bar=“example.org/bar” xmlns:baz=“example.org/baz” xmlns:foo=“example.org/foo” xml:lang=“en-ie”>

(//. | //@* | //namespace::*) 
[ 
          <!-- only namespace nodes -->
          ancestor-or-self::bar:Something  and
          (count(parent::node()/namespace::*)  =
           count(parent::node()/namespace::* | self::node()))
]

</XPath>