On Fri, Nov 19, 2010 at 09:25:50AM +0100, Wolfgang Laun scripsit:
> The O(n^2) is due to iterating over a list (for) and then iterating
> over the document tree to find //num/@cite.
> 
> The following stylesheet should do it better,using xsl:key:

I am reluctant to approach the problem with xsl:key because I have about
90,000 individual files in a complex directory structure and I would
need a key over all of them, rather than each of them.

Since far as I know -- and happy to be wrong! -- I can't declare a key
over a collection, so this approach would require concatenating all of
the files together.  Which is certainly doable but also inherently
sluggish.

> <?xml version="1.0"?>
> <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
>   <xsl:output method="text"/>
>   <xsl:strip-space elements="*"/>
>   <xsl:key name="citekey" match="num" use="@cite"/>
>   <xsl:template match="link">
>     <xsl:value-of select="(key('citekey',@cite),'ok',concat(@cite,' is
> missing'))[2]"/><xsl:text>
> </xsl:text>
>   </xsl:template>
> </xsl:stylesheet>
> 
> I have tested it with a very primitive XML only:
> 
> <doc>
>   <foo>
>     <num area="decisions" cite="1"/>
>     <bar>
>       <link area="decisions" cite="1"/>
>       <link area="decisions" cite="2"/>
>     </bar>
>   </foo>
> </doc>

Thank you!

-- Graydon