Test http://www.w3.org/2001/DOM-Test-Suite/level2/core/prefix09

<test name='prefix09' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-2 dom2.xsd'>
     <metadata>
          <title>prefix09</title>
          <creator>NIST</creator>
          <description> The "setPrefix(prefix)" method raises a NAMESPACE_ERR DOMException if the specified node is an attribute and the qualifiedName of this node is xmlns. Attempt to set the prefix on the xmlns attribute within the fourth address element. An exception should be raised since the qualifiedName of this attribute is "xmlns". </description>
          <contributor>Mary Brady</contributor>
          <date qualifier='created'>2001-08-17</date>
          <subject resource='http://www.w3.org/TR/DOM-Level-2-Core/core#xpointer(id('ID-258A00AF')/constant[@name='NAMESPACE_ERR'])'/>
          <subject resource='http://www.w3.org/TR/DOM-Level-2-Core/core#ID-NodeNSPrefix'/>
          <subject resource='http://www.w3.org/TR/DOM-Level-2-Core/core#xpointer(id('ID-NodeNSPrefix')/setraises/exception[@name='DOMException']/descr/p[substring-before(.,':')='NAMESPACE_ERR'])'/>
</metadata>
     <!-- this test requires namespace awareness -->
     <implementationAttribute name='namespaceAware' value='true'/>
     <var name='doc' type='Document'/>
     <var name='elementList' type='NodeList'/>
     <var name='addrNode' type='Element'/>
     <var name='addrAttr' type='Attr'/>
     <load var='doc' href='staffNS' willBeModified='true'/>
     <getElementsByTagName interface='Document' obj='doc' tagname='"address"' var='elementList'/>
     <item interface='NodeList' obj='elementList' index='3' var='addrNode'/>
     <getAttributeNode obj='addrNode' name='"xmlns"' var='addrAttr'/>
     <assertDOMException id='throw_NAMESPACE_ERR'>
          <NAMESPACE_ERR>
               <prefix obj='addrAttr' value='"xxx"'/>
          </NAMESPACE_ERR>
     </assertDOMException>
</test>

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