RE: Conditional Assigining

Here is my xml
section.xml
----------------
	<Section>

	<Section>
		<sectionID>19</sectionID>
		<parentID>10</parentID>
		<bulletinID>1</bulletinID>
		<groupID>1</groupID>
		<dictionaryID>1012</dictionaryID>
		<text>Section 1.1.1.1</text>
	</Section>
	<Section>

<xsl:template match="First">
	<!--<xsl:for-each select="Section[parentID='0']"> -->
	<xsl:for-each select="Section">
	<xsl:variable name="ID" select="sectionID"/>
	<xsl:value-of select="text"/>
		<xsl:for-each select="../Section[parentID=$ID]">
			<xsl:value-of select="text"/><br/>
			<xsl:variable name="ID" select="sectionID"/>
<!--			currentID = <xsl:value-of select="$ID" />-->
		</xsl:for-each>
<!--		<xsl:variable name="ID" select="sectionID"/>
		sectionid afterloop= <xsl:value-of select="$ID" />-->
<!--		<xsl:variable name="ID" select="text"/>
		text afterloop = <xsl:value-of select="$ID" />-->

	</xsl:for-each>
</xsl:template>

CURRENT OUTPUT:
-----------------
	id 1
	pid 0
	text Section 1

	id 5
	pid 1
	text Section 1.1

	id 10
	pid 5
	text Section 1.1.1

	id 19
	pid 10
	text Section 1.1.1.1

Desired Output
===============
	id 1
	pid 0
	text Section 1

	id 5
	pid 1
	text Section 1.1

	id 10
	pid 5
	text Section 1.1.1

	id 19
	pid 10
	text Section 1.1.1.1

	id 11
	pid 1
	text Section 1.2

Thanks in advance,
Srini

From: "Michael Kay" <mhkay@xxxxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE:  Conditional Assigining
Date: Wed, 16 May 2001 17:15:17 +0100

>
> <xsl:variable name="ID">-1</xsl:variable>
> <xsl:for-each select="Section[parentID='0']">
> <xsl:if test="$ID=-1">
> <xsl:variable name="ID" select="sectionID" />
> </xsl:if>
> id <xsl:value-of select="$ID"/>
>
XSLT isn't a sequential programming language, you are trying to use it as if
it were. You can't do things in one iteration of xsl:for-each that affect
subsequent iterations, because there is no such thing as "subsequent" in a
non-sequential language. (See my XSLT Programmer's Reference for an essay on
the subject...)

Instead you want something like

<xsl:for-each select="Section[parentID='0']">
  <xsl:choose>
  <xsl:when test="preceding-sibling::Section[parentID='0']">
     <xsl:value-of select="preceding-sibling::Section[parentID='0'][1]"/>
  </xsl:when>
  <xsl:otherwise>-1</xsl:otherwise>
  </xsl:choose>
</xsl:for-each>

That works because it expresses the output as a function of the input.

Mike Kay


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