RE: [xsl] xsl:key function help

["Michael Kay" <mike@xxxxxxxxxxxx>]

Try count(key('Categories','Microsoft'))

The second argument of key() is an expression that evaluates to the key
value you are searching for. The expression you have supplied is Topic,
which means child::Topic, and as the context node is "/" and "/" doesn't
have a child Topic, you have supplied an empty node-set as the key value, so
nothing matches.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: David Preuss [mailto:d.preuss@xxxxxxxxxxx] 
> Sent: 03 August 2005 16:02
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] xsl:key function help
> 
> Dear all,
> 
> as a newbie I tried to play with the key function but didnt 
> get it. Could
> someone help me out?
> 
> I got following stylesheet just to test wether its working or not:
> 
> <?xml version='1.0' encoding='UTF-8'?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> <xsl:key name="Categories" match="Tip" use="@Topic" />
> <xsl:output method="xml"/>
> 	
> 	<xsl:template match="/">
> 		<xsl:value-of select="count(key('Categories',Topic))"/>
> 	</xsl:template>
> 
> </xsl:stylesheet>
> 
> The Xml is:
> 
> <TipDatabase>
> 	<Tip Topic="Microsoft" Subtopic="Exchange">
> 		<Title>
> 			Make public folders available offline
> 		</Title>
> 		<Content>
> 			Public folders can be made available offline by
> right clicking the folder and adding it to the Favorites folder.
> 			<Image Name="AddPublicFoldersToFavorites.jpg"/>
> 			Then adding them to the list of 
> synchronized folders
> by using keyboard combination Ctrl+Alt+S and selecting Edit.
> 			<Image 
> Name="PublicFoldersOfflineAvailable.jpg"/>
> 		</Content>
> 	</Tip>
> ...
> <TipDatabase>
> 
> Basically I want to use Muenchian Grouping to render my 
> navigation later but
> first I have to get the concepts clear in my head.
> 
> I use the stylesheet inside .net transform method. When I 
> output the above
> stylesheet The result is:
> 
> 0
> 
> What is wrong here or what am I missing.
> David