Re: Keys off of variable xml source

Thanks for all the effort here, the context of keys and how to use
them against external xml source is much clearer to me now.  This (as
usual) was a very valuable lesson!


On Apr 1, 2005 10:08 AM, Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> wrote:
> Karl,
> 
> At 11:24 AM 4/1/2005, you wrote:
> >The reason for a lookup xml source is to act as a cross-reference to
> >data in the main xml source.  So, I need to reference all elements
> >who's ID = 123 but my match is expressed as a code value "abc".  The
> >code "abc" maps to 123 in my lookup.
> >So, I'm still scratching my head wondering how I might effectively put
> >the external file to use with keys, but thinking it won't work, the
> >context would strictly be of the main xml source.
> 
> source:
> <match code="abc"/>
> 
> lookup:
> <code lookup="abc" value="123"/>
> 
> in the stylesheet:
> 
> <xsl:variable name="lookup" select="document('lookup.xml')"/>
> 
> <xsl:variable name="codes" match="*" use="@lookup"/>
> 
> <xsl:template match="match">
>   <xsl:variable name="lookup-code" select="@code"/>
>   <xsl:variable name="target-id">
>     <xsl:for-each select="$lookup"/>
>       <xsl:value-of select="key('codes',$lookup-code)/@value"/>
>     </xsl:for-each>
>   </xsl:variable>
>   ... now the value '123' is available bound to $target-id
>       (as an RTF, convertible to a string) ...
> </xsl:template>
> 
> I hope that helps. It's a bit cumbersome in XSLT 1.0, but works well enough.
> 
> Cheers,
> Wendell
> 
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