RE: [xsl] selecting unique entries from a list

["Aron Bock" <aronbock@xxxxxxxxxxx>]

This is a grouping question, and if you hear people groaning it's because 
these seem to arise repeatedly :-)  Please see Jeni Tennison's site for 
descriptions on a couple different ways to do this--at least one of them, 
the Meunchian Method, is efficient and performant: www.jenitennison.com

The archives for this list is here: 
http://www.biglist.com/lists/xsl-list/archives/ .  It's searchable, and I'm 
sure you'll find many references to grouping.

The following is a site that culls topics of interest from this ng: 
http://www.dpawson.co.uk/xsl/xslfaq.html

Regards,

--A

> From: "Hallas,M" <M.Hallas@xxxxxxxxx>
> Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
> Subject: [xsl] selecting unique entries from a list
> Date: Thu, 5 May 2005 11:14:35 +0100
>
> Dear all,
>
> Hope you can help with this query. I am new to XML/XSLT.
>
> I need to take the following XML and generate an initial web page 
> displaying only one instance of
> each department name.
>
> <xml>
> <List>
> 	<Entry>
> 		<Session>2004/5</Session>
> 		<Department>Accounting and Finance</Department>
> 	</Entry>
> 	<Entry>
>
> 		<Session>2004/5</Session>
> 		<Department>Accounting and Finance</Department>
> 	</Entry>
> 	<Entry>
> 		<Session>2004/5</Session>
> 		<Department>Maths</Department>
> 	</Entry>
> 	<Entry>
> 		<Session>2004/5</Session>
> 		<Department>Maths</Department>
> 	</Entry>
> 	<Entry>
> 		<Session>2004/5</Session>
> 		<Department>Economic History</Department>
> 	</Entry>
> </List>
> </xml>
>
> so in the html only unique departments would be displayed once:
>
>
> 	Accounting and Finance
> 	Maths
> 	Economic History
>
> What's the best way to do this in xslt?
>
> I understand that I can filter on specific names within the xslt and do 
> conditional
> tests but I do not want to have to change the xslt each time if the 
> departments in the xml change.
>
> Hope it makes sense.
>
> Regards,
>
> Mike

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