xmlns:f="Animals"

<xsl:template match="f:UnitInfos">
<xsl:copy>
	      <xsl:copy-of
	      select="f:UnitInfo[f:Type=document('list.xml')/f:UnitInfos/f:Type]"/>
</xsl:copy>
</xsl:template>

David

________________________________________________________________________
The Numerical Algorithms Group Ltd is a company registered in England
and Wales with company number 1249803. The registered office is:
Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom.

This e-mail has been scanned for all viruses by Star. The service is
powered by MessageLabs. 
________________________________________________________________________