<dsig:CanonicalizationMethod xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" xmlns:c14n2="http://www.w3.org/2010/xml-c14n2" Algorithm="http://www.w3.org/2010/xml-c14n2">
  <c14n2:QNameAware>
   <c14n2:Element Name="bar" NS="http://a"/>
  </c14n2:QNameAware>
</dsig:CanonicalizationMethod>