Re: [xsl] impossible to implement this algorithm in xslt?

[Christoph Naber <dio2000@xxxxxxx>]

I'm not 100% sure about this solution, but I think it should work. You 
propably want to do the work by using the preceding-axis.

<xsl:template match="/" >
	<xsl:apply-templates select="*" />
</xsl:template>

<xsl:template match="sect" >
	<xsl:copy>
		<xsl:copy-of select="node()" />
	</xsl:copy>
</xsl:template>

<xsl:template match="A | B">
	<xsl:variable name="depth" select="preceding::sect[1]/@depth" />
	
	<xsl:copy>
		<xsl:attribute name="level" select="@level + $depth"
		<xsl:apply-templates select="*" />
	</xsl:copy>
</xsl:template>

Greetings Christoph


Tom Schmitter schrieb:
> I'm beginning to despair in the possibility that it may be impossible to
> implement this algorithm in xslt. Perhaps one of you battle-hardened vets
> could shed some light...
>  
> Input doc:
> <doc>
> 	<sect depth="3">heading</sect>
> 	<A level="1">
> 		<B level="2">xx</B>
> 	</A>
> 	<sect depth="7">heading2</sect>
> 	<C level="1">
> 		<D level="2">yy</D>
> 	</C>
> </doc>
>
> Desired output:
> <doc>
> 	<sect depth="3">heading</sect>
> 	<A level="4">
> 		<B level="5">xx</B>
> 	</A>
> 	<sect depth="7">heading2</sect>
> 	<C level="8">
> 		<D level="9">yy</D>
> 	</C>
> </doc>
>
> Note how the 'level' attributes in the output represent the sum of their
> value in the input and the value of the 'depth' attribute of the <sect>
> which precedes it.
>
> Given the recursive processing paradigm of xslt, without the ability for a
> template to return a value or to set a global variable, I can't figure out
> how I can process the <sect>s and make the value of their 'depth'
> attributes available for the processing of the other elements.
>
> Would someone please tell me I'm missing something?!?
>
> Thanks very much