> For one there is cross-ref and for another there is no. In these cases
> also it should do the grouping.


<xsl:function name="f:country" as="xs:string">
 <xsl:param name="a" as="element()"/>
 <xsl:choose>
  <xsl:when test="$a/cross-ref">
   <xsl:sequence select="key('country', $a/cross-ref/@refid,root($a))/tokenize(.,',\s+')[last()]"/>
  </xsl:when>
  <xsl:otherwise>
     <xsl:sequence select="$a/following-sibling::affiliation[1]/tokenize(.,',\s+')[last()]"/>
  </xsl:otherwise>
 </xsl:choose>
</xsl:function>

________________________________________________________________________
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. 
________________________________________________________________________