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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] building hierarchy from path string
 I've spent the day trying to write a transformation that will take: <tree> <node depth="0" OID="1" name="Animals" path="100000" /> <node depth="1" OID="2" name="Reptile" path="102000" /> <node depth="2" OID="5" name="Snake" path="102010" /> <node depth="2" OID="6" name="Crock" path="102020" /> <node depth="2" OID="7" name="Gator" path="102030" /> <node depth="1" OID="3" name="Bird" path="103000" /> <node depth="1" OID="4" name="Mamal" path="103000" /> </tree> and give me: <tree>
<node name="Animals">
<node name="Reptile">
<node name="Snake" />
<node name="Crock" />
<node name="Gator" />
</node>
<node name="Bird />
<node name="Mamal" />
</tree>I use the depth & path attributes to tell me how the hierarchy is to be built. The path attribute is a sort order and the depth attribute (actually just durived from the path) tells me how deep in the hierarchy the particular node is. The approach I have been working with uses for-next & recursion, and while it will build the hierarchy properly 'til snake, I am having trouble figuring out how to make the recusion unwind properly and pick up the shallower elements. Should I be using the Muenchian technique? How would I implement it here? The path string is my major asset, I built the depth only to that I wouldn't have to parse the path in my XSLT. The following demonstates that I am on the wrong track.... :) <?xml version="1.0"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="text/xml" indent="yes" /> <!-- main page --> <xsl:template match="/tree"> <tree> <xsl:apply-templates /> </tree> </xsl:template> <!-- loop through nodes --> <xsl:template match="//node[1]"> <xsl:call-template name="treeBuilder"> <xsl:with-param name="nodeElement" select="."/> </xsl:call-template> </xsl:template> <!-- treeBuilder Template --> <xsl:template name="treeBuilder"> <xsl:param name="nodeElement" /> <!-- start the element and add some attributes --> <xsl:element name="node"> <xsl:attribute name="name"> <xsl:value-of select="$nodeElement/@name"/> </xsl:attribute> <xsl:attribute name="depth"> <xsl:value-of select="$nodeElement/@depth"/> </xsl:attribute> <!-- do we need to include elements as part of this one? --> <xsl:if test="$nodeElement/following::node[position()=1]/@depth > $nodeElement/@depth"> <xsl:call-template name="treeBuilder"> <xsl:with-param name="nodeElement" select="$nodeElement/following-sibling::node[position()=1]"/> </xsl:call-template> </xsl:if> </xsl:element> </xsl:template> </xsl:stylesheet> Any pointers would be much appreciated. John-Mason -- http://john-mason.shackelford.org XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list 
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