Re: [xsl] adding multiple variables to a complex condition

[Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>]

Hi Eric,

> What is a good way to add other variables like output2 .. $outputn
> to this conditional?

Yes. Use an XML structure to hold the various names:

  <output>output1</output>
  <output>output2</output>
  ...
  <output>outputN</output>

Hold these output elements in a node set called $outputs. This enables
you to check if *any* or *none* of the outputs fulfil certain
conditions, because it's easy to check whether *any* or *no* node
fulfils conditions. For example:

  $outputs = 'all'

would check whether *any* output had the value 'all'.

How you get the $outputs variable holding those output elements is up
to you. The purest way would be to put them in a separate document or
in the stylesheet and use the document() function to get at them.
Alternatively, you could build a variable and an extension node-set()
function to get at them.

I'm not sure that I follow the logic of your condition, but I think
you want something like the following:

<xsl:template name="conditional">
  <xsl:variable name="include" select="@include" />
  <xsl:variable name="exclusive" select="@exclusive" />
  <xsl:variable name="reject" select="@reject" />
  <xsl:choose>
    <xsl:when test="
      $outputs = 'all' or
      ((ancestor::*|@*)[name() = $outputs] or
       $outputs[contains($include, .)] or
       $outputs[contains($exclusive, .) and
                not(contains($reject, .))] and
       not($reject = 'all'))">yes</xsl:when>
    <xsl:otherwise>
      ...
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

Note that you need to do $outputs[contains($include, .)] rather than
contains(@include, $outputs) because the contains() function converts
the second argument to a string, so contains(@include, $outputs) would
test whether the include attribute contains the first output, not any
of the others.

I hope that helps,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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