<xsl:variable name="reg">
<xsl:for-each select="//reg">
<xsl:copy-of select="."/>
</xsl:for-each>
</xsl:variable>
..
<xsl:when test="$reg/
Note that's not legal in XSLT1 (as $reg is a result tree fragment) it's
legal but expensive in xslt2 (as you have to copy all the nodes)
better to do
<xsl:variable name="reg" select="//reg"/>
An alternative strategy would be
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:template match="top">
<xsl:for-each select="a/reg">
:<xsl:variable name="x"
select="(.|preceding-sibling::reg)[(_at_)offset][last()]"/>
<xsl:value-of select="."/>: <xsl:value-of select="sum($x/@offset) +
count(preceding-sibling::reg) - count($x/preceding-sibling::reg)"/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
David
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