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Hi Michael,
Sorry, I was too quick in suggesting to add the filtering test to the grouping predicate:
<xsl:template match="Documents"> <Documents> <xsl:for-each select="Document/Article[count(.|key('by-info', @info)[1])=1]"> <Document name="{@info}"> <xsl:copy-of select="key('by-info', @info)[@filter='food']"/> </Document> </xsl:for-each> </Documents> </xsl:template> Hope that helps better :) Anton
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