1 <?xml version="1.0"?>

     2 <!-- Attribute uniqueness: prefixed and unprefixed attributes with same

     3      local name, with default namespace and element in default namespace -->

     4 <foo xmlns:a="http://example.org/~wilbur"

     5      xmlns="http://example.org/~wilbur">

     6 

     7 <bar a:attr="1" attr="2"/>

     8 

     9 </foo>