Re: [xsl] conditional match

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Hi Kevin,

At 08:42 PM 5/31/01, you wrote:

> I would like to insert a conditional statement in my XSLT that if or when
> true would cause a template match:
>
> For instance:
>
> <xsl:choose>
>      <xsl:when test="$TRANSFORMER_Platform='test'">
>           <xsl:call-template name="zoom"/>
>      </xsl:when>
> </xsl:choose>
>
> thus,
>
> <xsl:template  name= "zoom" match="/././>
>      <xsl:element name="zoom">
>           <xsl:value-of select="number() div .25"/>
>      </xsl:element>
> </xsl:template>
>
> However, I assume that inserting the match causes the template to
> automatically be executed even without the when being true. If I remove it
> though, I am not sure how to match the node I want.

You assume incorrectly.

A template fires *if* it is the best match for a node on which an 
xsl:apply-templates instruction is called, *or* if it is called by name.

It is perfectly legal, and not uncommon, to have a template like

<xsl:template name="zoom">
  <xsl:element name="zoom">
    <xsl:value-of select="number() div .25"/>
  </xsl:element>
</xsl:template>

which never matches: it can still be called by name as in your example.

Hope that helps,
Wendell



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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Suite 207                                          Phone: 301/315-9631
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