Re: [xsl] XPath: selecting matching nodes in two node-sets

[Mukul Gandhi <mukulgw3@xxxxxxxxx>]

Hi Richard,
 From what I understood from the problem description,
I constructed the following XML --

<?xml version="1.0" encoding="UTF-8"?>
<results>
   <keywords>
     <matches>1</matches>
     <matches>2</matches>
     <matches>3</matches>
   </keywords>
   <item>
     <matches>1</matches>
     <matches>2</matches>
   </item>
   <item>
    <matches>1</matches>
    <matches>2</matches>
    <matches>3</matches>
   </item>
   <item>
     <matches>1</matches>
     <matches>2</matches>
   </item>
   <item>
     <matches>1</matches>
     <matches>2</matches>
     <matches>3</matches>	              
   </item>
   <item>
     <matches>1</matches>
     <matches>2</matches>
     <matches>3</matches>
     <matches>4</matches>
   </item>
</results>

(I have taken the above XML, as a test case. The
contents of the XML may vary(depending what is wanted,
for the real problem); but I have tried to make the
XML, identical according to the problem description,
given by you.)

The following XSL *tries to demonstrate*, how to
compare the <item> nodes following the <keywords>
node, with the *children of <keywords> node*) --

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="text" version="1.0"
encoding="UTF-8" indent="yes"/>
	
<xsl:template match="/results">
     <xsl:variable name="key-words">
       <xsl:copy-of select="keywords/matches" />
     </xsl:variable>
	      
     <xsl:for-each select="item">
        <xsl:variable name="item">
           <xsl:copy-of select="matches" />
        </xsl:variable>
	          
        <xsl:if test="$key-words = $item">
           Position of Item node (which is identical
to 'keywords' node) <xsl:value-of select="position()"
/>
        </xsl:if>	          
     </xsl:for-each>
</xsl:template>
	
</xsl:stylesheet>

After the desired comparison is performed, the
position of <item> node is printed, to get the
answer..

Hope, the above explanation is useful..

Regards,
Mukul

--- Richard Lewis <richard.lewis@xxxxxxxxx> wrote:
> I have the following document:
> 
> <results>
> 	<keywords>
> 		<matches>...</matches>
> 		...
> 	</keywords>
> 	<item>
> 		...various elements...
> 		<matches>...</matches>
> 		<matches>...</matches>
> 		...
> 	</item>
> 	<item>....</item>
> 	...
> </results>
> 
> (where <matches> elements contain the keywords
> themselves, CDATA).
> 
> and what I need is an XPath expression which selects
> all the <item>s which 
> have the same set of <matches /> elements as in the
> <keywords> node.
> (Note: there may be repetition of <matches />s in
> <item>s but not in 
> <keywords>)
> 
> I've tried:
> "//item[matches = //keywords/matches]"
> but this selects <item>s where not all the
> '//keywords/matches' elements are 
> present.
> 
> Cheers,
> Richard
> 
>  XSL-List info and archive: 
> http://www.mulberrytech.com/xsl/xsl-list
> 


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