<rng:grammar xmlns:html="http://www.w3.org/TR/REC-html40" xmlns="http://www.example.com" xmlns:rng="http://relaxng.org/ns/structure/1.0" >
     <comment/>
     <comment/>
     <rng:start>
          <comment/>
          <rng:element>
               <comment/>
               <comment/>
               <rng:name>foo</rng:name>
               <comment/>
               <rng:data type="string"/>
               <comment/>
          </rng:element>
          <comment/>
     </rng:start>
     <comment/>
</rng:grammar>