[xsl] Split with delimiter and remove duplicate with xsl:for-each group

Hi,

I am trying to use the combination of <xsl:for-each-group> to avoid
duplicate and split data of <Affiliation> , using [number] as the delimiter.

Last week Martin has given a nice solution for splitting as below, I am not
able to use it with <xsl:for-each group>


Input
======
<Article>
   <AuthorList>
   <Author>
    <FirstName>E E</FirstName>
    <LastName>Bosco</LastName>
    <Affiliation>
1Department of Cell and Cancer Biology, University of Cincinnati,
Cincinnati, OH, USA
[2] 4Division of Biomedical Informatics, Cincinnati Children&#39;s Hospital
Medical Center, Cincinnati, OH, USA</Affiliation>
   </Author>
   <Author>
    <FirstName>K</FirstName>
    <LastName>Stengel</LastName>
    <Affiliation>
1Department of Cell and Cancer Biology, University of Cincinnati,
Cincinnati, OH, USA</Affiliation>
   </Author>
   <Author>
    <FirstName>H</FirstName>
    <LastName>Xu</LastName>
    <Affiliation>
 [1] 3Department of Pediatrics, University of Cincinnati, Cincinnati, OH,
USA
 [2] 4Division of Biomedical Informatics, Cincinnati Children&#39;s Hospital
Medical Center, Cincinnati, OH, USA</Affiliation>
   </Author>
</AuthorList>
</Article>



Desired Output
===============

<affiliationlist>
   <affil>1Department of Cell and Cancer Biology, University of Cincinnati,
Cincinnati, OH, USA</affil>
   <affil>4Division of Biomedical Informatics, Cincinnati Children&#39;s
Hospital Medical Center, Cincinnati, OH, USA</affil>
   <affil>3Department of Pediatrics, University of Cincinnati, Cincinnati,
OH, USA</affil>
</affiliationlist>



What I've tried till, which I understand is terribly incorrect, might be in
selection of current-grouping-key(), though trying from few hours (Never
tried xsl:for-each-group before):

Stylesheet
==========

                        <affiliationlist>
                                        <xsl:call-template
name="affiliation"/>    
                        </affiliationlist>




<xsl:template name="affiliation">
<xsl:for-each-group select=".//Affiliation" group-by="./Author/Affiliation">
<xsl:value-of select="current-grouping-key()"/>
 <xsl:for-each select="tokenize(., '\[\d+\]')[normalize-space(.)]">
<affil>
  <xsl:value-of select="normalize-space(current-grouping-key())"/>
</affil>
 </xsl:for-each>
</xsl:for-each-group>
</xsl:template>


Can somebody guide me in this regard.



Best,

Pankaj Chaturvedi

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