[xsl] Comparing two XML documents

[Rahil Qamar Yahoo <qamar_rahil@xxxxxxxxxxx>]

Hi

I have two XML documents which are logically equivalent but are very 
different in terms of structure.

---------------------------
XML File 1:
   <level>16</level>
                               <parent>at0001</parent>
                               <text>Severity</text>
                               <value type="relationship constraint">
                                   <node type="complex object 
constraint" occurrences="1" rm_class="TEXT">
                                       <level>17</level>
                                       <parent>at0001</parent>
                                       <code type="relationship 
constraint">[MildSeverity,ModerateSeverity,SevereSeverity]
                                       </code>
                                       </node>
                               </value>
                           </node>
---------------------------

---------------------------
XML File 2:
<DEFCONCEPT id="10235" name="Severity">
       <PARENT>
           <CONCEPT name="DiseaseFeature" ref="10234"/>
       </PARENT>
       <IMPLIES>
           <CONCEPT name="MildSeverity" ref="10238"/>
           <CONCEPT name="ModerateSeverity" ref="10239"/>
           <CONCEPT name="SevereSeverity" ref="10240"/>
       </IMPLIES>
   </DEFCONCEPT>

---------------------------

Could someone please let me know whats the best way to compare these two 
documents logical structure. I looked at the Canonical XML but it seems 
quite basic for my requirements.

Any suggestions would help.

Thank you
Rahil