Hi List.
I was wondering if anyone could help me to filter out data in an XML stream.
(can be xslt 2.0...)

For example, I have
<xml>

       <city>
             <name>Paris</name>
             <person>Paul</person>
       </city>
       <city>
             <name>New-York</name>
             <person>John</person>
       </city>
       <city>
             <name>Paris</name>
             <person>George</person>
       </city>
</xml>

<xsl:for-each-group select="city" group-by="name">
<xsl:value-of select="name/>
<xsl:value-of select="current-group()/person" separator=","/>
</xsl:for-each-group>

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