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Hi Andrew and Michael,
Michael, Sorry, I normally do provide sample input and a context, but it would have taken a great deal of time to set up and it is just after 3 am. Luckily, Andrew spotted exactly what I needed. Andrew, Perfect! (And I would have never thought of using the grouping key, but now I know.) You are right (2)'s grouping key does look odd. It is used to output a set of XHTML navigation buttons keyed to the "other kinds of formats available in <Formats>". In full, (2) looks quite strange, but it has replaced almost five pages of complex string parsing and testing. Ken Holman got on my case about my using so much C++ idiom string-parsing, so I been trying to work with just the nodes. My unexplained cps:functions mostly output formatted text for the XHMTL page. Thanks to you both, Mark (2) in full: <!-- Show related formats --> <xsl:choose> <xsl:when test="count(../../Stamp/Formats/@*[not(name(.)=$format)]) eq 1"> <xsl:if test="../../Stamp/Formats/@*[not(name(.)=$format)] eq $item"> <a lang="en" class="button" href="{concat(ancestor::Set/@year, '-',../../Stamp/Formats/@*[not(name(.)=$format)],cps:file-format-from-name(name(../../Stamp/Formats/@*[not(name(.)=$format)])), '.htm')}"> <xsl:value-of select="cps:english-format-name(name(../../Stamp/Formats/@*[not(name(.)=$format)]))"/> </a> <a lang="cz" class="button" href="{concat(ancestor::Set/@year, '-', ../../Stamp/Formats/@*[not(name(.)=$format)], cps:file-format-from-name(name(../../Stamp/Formats/@*[not(name(.)=$format)])),'.htm')}"> <xsl:value-of select="cps:czech-format-name(name(../../Stamp/Formats/@*[not(name(.)=$format)]))"/> </a> </xsl:if> </xsl:when> <xsl:otherwise> <xsl:for-each-group select="../../Stamp/Formats" group-by="@*[not(name(.)=$format)]"> <xsl:for-each select="current-group()"> <xsl:if test="current-grouping-key() eq $item"> <a lang="en" class="button" href="{concat(ancestor::Set/@year, '-', @*[not(name(.)=$format)],cps:file-format-from-name(name(@*[not(name(.)=$format)])), '.htm')}"> <xsl:value-of select="concat(cps:english-format-name(name(@*[not(name(.)=$format)])), ' ')"/> <xsl:value-of select="position()"/> </a> <a lang="cz" class="button" href="{concat(ancestor::Set/@year, '-', @*[not(name(.)=$format)], cps:file-format-from-name(name(@*[not(name(.)=$format)])),'.htm')}"> <xsl:value-of select="position()"/> <xsl:value-of select="concat('. ', cps:czech-format-name(name(@*[not(name(.)=$format)])))"/> </a> </xsl:if> </xsl:for-each> </xsl:for-each-group> </xsl:otherwise> </xsl:choose>
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