I'm not using xsl 2.0 and have taken a bit of a different, somewhat
linear approach, but this should work for what you are trying to do:
xsl:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:template match="/">
<xsl:apply-templates select="doc/sect_break[1]"/>
</xsl:template>
<xsl:template match="sect_break">
<xsl:variable name="depth" select="./@depth"/>
<xsl:variable name="next_depth"
select="(following-sibling::sect_break)[1]/@depth"/>
<xsl:variable name="elementName" select="concat('level',$depth)"/>
<xsl:choose>
<xsl:when test="$next_depth > $depth">
<xsl:element name="{$elementName}">
<xsl:apply-templates
select="(following-sibling::sect_break)[1]"/>
</xsl:element>
<xsl:apply-templates
select="(following-sibling::sect_break[(_at_)depth = $depth])[1]"/>
</xsl:when>
<xsl:when test="$next_depth = $depth">
<xsl:element name="{$elementName}"/>
<xsl:apply-templates
select="(following-sibling::sect_break)[1]"/>
</xsl:when>
<xsl:otherwise><xsl:element name="{$elementName}"/></xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
input:
<doc>
<sect_break depth="1"/>
<sect_break depth="2"/>
<sect_break depth="2"/>
<sect_break depth="3"/>
<sect_break depth="1"/>
</doc>
output:
<level1>
<level2/>
<level2>
<level3/>
</level2>
</level1>
<level1/>
thanks, dan
--
Dan Ochs, Principal Consultant
Wrycan Inc.
http://xsl.wrycan.com
dan(dot)ochsatwrycan(dot)com
On Sun, Jul 20, 2008 at 10:09 AM, tom s <tshmit(_at_)yahoo(_dot_)com> wrote:
Hi List,
I've been struggling for more hours than I care to admit on a simple task -
passing a parameter through a series of templates using tunnel="yes". For
some reason my parameter seems to be lost along the way and inevitably ends
up with the default value (0).
In the abbreviated "sect_break" template below=2C the param "prev_depth"
should start out at 0 then be set to 1 as it's passed through apply-templates
the first time. But the next time sect_break is called prev_depth is 0 (or
whatever default is specified in the param's select):
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";;
xmlns:xs="http://www.w3.org/2001/XMLSchema";;
xmlns:fn="http://www.w3.org/2005/xpath-functions";;>
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="sect_break">
<!-- prev_depth is the depth that we were at before encountering this
sect_break -->
<xsl:param name="prev_depth" select="0" tunnel="yes"/>
<!-- depth is the depth indicated in the current sect_break -->
<xsl:variable name="depth" select="./@depth" as="xs:integer"/>
<xsl:variable name="direction" select="$depth - $prev_depth"
as="xs:integer"/>
<xsl:choose>
<xsl:when test="$direction > 0">
<!-- going deeper in depth -->
sect_break depth=<xsl:value-of select="$depth"/>
<xsl:apply-templates>
<xsl:with-param name="prev_depth" select="$depth"
tunnel="yes" />
</xsl:apply-templates>
</xsl:when>
<!-- some other cases have been omitted for brevity -->
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
Sample input:
<doc>
<sect_break depth="1"/>
<sect_break depth="2"/>
<sect_break depth="2"/>
<sect_break depth="3"/>
<sect_break depth="1"/>
</doc>
(fwiw, the objective is to create a nested hierarchy from one that is defined
unnested. eg:
<level 1>
<level 2>
<level 2>
<level 3>
<level 1>
becomes:
<level 1>
<level 2>
</level>
<level 2>
<level 3>
</level>
</level>
</level>
<level 1>
</level>
)
Thanks very much for any help!
--Tom
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