RE: [xsl] container list display problem

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Loren,

You could also try a more general approach, using the preceding:: axis --

<xsl:variable name="reelnumber">
  <xsl:value-of select="container[@type='reel']"/>
</xsl:variable>
<xsl:variable name="prevreelnumber">
  <xsl:value-of select="preceding::container[@type='reel'][1]"/>
</xsl:variable>
<xsl:choose>
  <xsl:when test="$reelnumber = $prevreelnumber">
    ...

Ordinarily, you may want to avoid the preceding axis on the grounds that 
it's expensive (it traverses the document back to the beginning); but it's 
designed for exactly the kind of application you have. Since you're going 
back just to the immediately preceding container[@type='reel'] (as 
indicated by the [1] predicate, which means the first in reverse document 
order, preceding being a "reverse" axis), however, a smart processor can 
optimize the node selection so the traversal isn't so bad.

I think I suggested preceding:: earlier; I don't know why I didn't think of 
it last night.

Cheers,
Wendell


At 03:21 PM 5/6/2002, you wrote:
>         <xsl:variable name="reelnumber">
>                 <xsl:value-of select="container[@type='reel']"/>
>         </xsl:variable>
> <xsl:choose>
>         <xsl:when 
> test="(../preceding-sibling::c03[1]/did/container[@type='reel']=$reelnumber)
>                     or 
> (../parent::c02/did/container[@type='reel']=$reelnumber)">
>
>                         <!--Selects cases where the value of the reel 
> container is the same as that of a previous
>                         component.   In that case, no column labels are 
> added and only the frame number appears
>                         along with the other component data.-->


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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