Re: XT, call-template, parameters, default values

[Phil Lanch <phil@xxxxxxxxxxxxxxx>]

Jon Smirl wrote:
> 
> The output from the following example is $$22$ not $22$22$ like I expected.
> At the intermediate stage VALUE is not specified but I need to select it in
> order to pass it on to the next stage. It appears that selecting it binds it
> so that I don't pick up the default in the final stage.
> 
> I can move my defaults up to the second level but this will make me copy
> them a hundred times. Is there a better way?
> 
> <kTaxItem type="vendTaxEnum">22</kTaxItem>
> 
> <xsl:apply-templates select="kTaxItem"/>
> 
> <xsl:template match="*[@type='vendTaxEnum']">
>    <xsl:param name="value"/>
>    <xsl:call-template name="buildEnum">
>       <xsl:with-param name="value" select="$value"/>
>       <xsl:with-param name="enums"
> select="document('../common/enum.xml')/enums/taxEnum"/>
>    </xsl:call-template>
> </xsl:template>
> 
> <xsl:template name="buildEnum">
>    <xsl:param name="value" select="."/>
>    <xsl:param name="enum"/>
>     value is $<xsl:value-of select="$value"/>$<xsl:value-of select="."/>$
> </xsl:template>

When you don't specify a value for a variable, it still has one: a null
string. That's the value of $value in the *[@type='vendTaxEnum']
template, and so it's passed to $value in the buildEnum template.

You could test the value of the $value inside the buildEnum template,
something like below. This involves changing *only* the buildEnum
template. (The way I've done it, the default value is *the string value
of* the current node. If that's not what you want in your non-simplified
stylesheet, then I supppose xsl:copy or xsl:copy-of would help.)

<xsl:template name="buildEnum">
   <xsl:param name="value"/>
   <xsl:variable name="actualValue">
      <xsl:choose>
         <xsl:when test="$value">
            <xsl:value-of select="$value"/>
         </xsl:when>
         <xsl:otherwise>
            <xsl:value-of select="."/>
         </xsl:otherwise>
      </xsl:choose>
   </xsl:variable>
   <xsl:param name="enum"/>
    value is $<xsl:value-of select="$actualValue"/>$<xsl:value-of
select="."/>$
</xsl:template>

-- 

bah...glugglug...humbug

phil

*witnesh relocation program alumnush*


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