identical

 >         <gitem>
>           <label><termdef id="key-identical" term="identical">identical</termdef></label>
>           <def>
>             <p>(Of <pt>URI</pt>s)
>               <emph>identical</emph>, according to the rules for identity in
>               <bibref ref="ref-xml-namespaces"/>.</p>
>           </def>

This isn't very satisfactory because the Namespaces Rec doesn't make it
clear that relative URIs have to be resolved before being compared for
identity.

James