It sounds as if your problem is in finding a design pattern for this
problem.

The problem is a multi-level grouping problem, where the first-level
grouping key is subsstring(code, 1, 1) and the second-level grouping key
is substring(code, 2, 1). 

With this knowledge you can apply the standard Muenchian grouping
technique as described at http://www.jenitennison.com/xslt/grouping, and
in all good textbooks.

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Jim Han
> Sent: 26 March 2003 20:25
> To: 'XSL-List@xxxxxxxxxxxxxxxxxxxxxx'
> Subject:  XML to XML
> 
> 
> I need some help in writing xsl to transform XML to XML.
> I am getting lost in concepts of having multiple templates
> 
> Original:
> <Categories>
> 	<Category>
> 		<Code>A</Code>
> 		<Description>Airplanes</Description>
> 	</Category>
> 	<Category>
> 		<Code>AA</Code>
> 		<Description>Airplanes (ARF)</Description>
> 	</Category>
> 	<Category>
> 		<Code>AAE</Code>
> 		<Description>Airplanes (ARF), Electric</Description>
> 	</Category>
> 	<Category>
> 		<Code>AAG</Code>
> 		<Description>Airplanes (ARF), Giant</Description>
> 	</Category>
> 	<Category>
> 		<Code>AAP</Code>
> 		<Description>Airplanes (ARF), Sailplane</Description>
> 	</Category>
> 	<Category>
> 		<Code>B</Code>
> 		<Description>Boats</Description>
> 	</Category>
> 	<Category>
> 		<Code>BA</Code>
> 		<Description>Boats (ARF)</Description>
> 	</Category>
> 	<Category>
> 		<Code>BAE</Code>
> 		<Description>Boats (ARF), Electric</Description>
> 	</Category>
> <Categories>
> 
> 
> Final Result - where one letter, two letter, and three letter 
> categories are nested.
> 
> 
> <Categories>
> 	<LevelOneCategory Code="A" Description="Airplanes">
> 		<LevelTwoCategory Code="AA" 
> Description="Airplanes (ARF)">
> 			<LevelThreeCategory  Code="AAE"
> Description="Airplanes (ARF), Electric"/>
> 			<LevelThreeCategory  Code="AAG"
> Description="Airplanes (ARF), Giant"/>
> 			<LevelThreeCategory  Code="AAP"
> Description="Airplanes (ARF), Sailplane"/>
> 		</LevelTwoCategory>
>       </LevelOneCategory>
> 	<LevelOneCategory Code="B" Description="Boats">
> 		<LevelTwoCategory Code="BA" Description="Boats (ARF)">
> 			<LevelThreeCategory  Code="BAE" 
> Description="Boats
> (ARF), Electric"/>
> 		</LevelTwoCategory>
>       </LevelOneCategory>
> <Categories>
> 
> Thank you!
> 
> 
> Jim Han
> 
> 
> 
> 
> 
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> 


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