[xsl] Comparing 2 XML Documents

["Fraser Goffin" <goffinf@xxxxxxxxxxx>]

Does anyone know a good way of comparing aspects of two XML instance 
documents using XSLT. The number of possible differences may be large so I 
would prefer not to have to create a hard coded test for each e.g. would 
prefer not to do this :-

<xsl:variable name="foo" select="document('foo.xml')"/>

<xsl:template match="Person">

   <xsl:if test="FName = $foo/Person/FNamel"> .. report mis-match .. 
</xsl:if>
   <xsl:if test="MiddleInitial = $foo/Person/MiddleInitial"> .. report 
mis-match .. </xsl:if>
   <xsl:if test="LName = $foo/Person/LName"> .. report mis-match .. 
</xsl:if>
   ....

</xsl:template>

   ... gzillions of other templates and tests ...

Am I barking up the wrong tree here trying to do this sort of thing in XSLT 
??

Cheers

Fraser.