XSLT get parent node based on child node's attribute

[Vijay Rao]

Hello all,

I have been struggling to learn XSL and stuck with one issue.

My input xml file is as follows:

 
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="C:\Documents and Settings\vvijay\Desktop\collection.xslt"?>
<collection>
<object id="12" type="horizontal">
<color>#HHHHHH</color>
</object>
<object id="3" type="linear" parentId="12">
<fontSize>12</fontSize>
</object>
<object id="2" type="linear" parentId="10">
<fontSize>12</fontSize>
</object>
<object id="10" type="vertical">
<color>#VVVVVV</color>
</object>
</collection>
   

What i need is as follows:

if a object has parentId, get the object whose id attribute matches with
current object's parentId.

If matches and the type of the found parent object is of type 'horizontal',
then get the color object.

below is the xsl i was trying to write.
Any help would be appreciatable.

    
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="collection">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="object">
<xsl:if test="@parentId">
<xsl:if test ="//object[@type='horizontal' and @id=@parentId]">
<xsl:value-of select="color"/>
</xsl:if>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
 

[ April 11, 2007: Message edited by: Vijay Rao ]

[Paul Clapham]

Try this, or something like it:

<xsl:if test="@parentId">
  <xsl:variable name="parent" select="@parentId"/>
  <xsl:value-of select="//object[@type='horizontal' and @id=$parent]/color"/>
</xsl:if>