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Re: [xsl] Trying to check if key is NOT found


Subject: Re: [xsl] Trying to check if key is NOT found
From: "Ihe Onwuka ihe.onwuka@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 12 Dec 2014 21:13:09 -0000

On Fri, Dec 12, 2014 at 9:01 PM, russurquhart1@xxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>
>  Hi,
>
> I have a snippet of xsl to try and look through our document xml, and let
> me know if a given CrossRefence href attribute  does NOT contain an element
> with a matching Target attribute. The href attribute value is some string
> of characters, prefixed by a '#'.  There are several elements that can have
> a Target attribute so i wrote my xsl like the following:
>
>  .c9Y6TC { color:#0000ff; }.c49DIK { color:#ac306d; }.c18YC0 {
> color:#d00020; }.c5M9S0 { color:#000090; }.c69ORU { color:#aaaba0; }
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> version="1.0">
>
>  <xsl:key name="target_ref_key" match="*[@Target]" use="@Target" />
>
>   <xsl:template match="CrossReference">
>
>     <xsl:variable name="unhash_name" select="substring-after(@href, '#')"/>
>     <xsl:variable name="matched" select="key('target_ref_key',
> $unhash_name)"/>
>     <xsl:if test="not($matched)">
>      No target for:
>      <xsl:value-of select="$unhash_name"/>
>     </xsl:if>
>
>   </xsl:template>
>
>
> </xsl:stylesheet>
>

Assuming the code above is correct why not

<!-- for the ones that match -->
<xsl:template
match="CrossReference[key('target_ref_key',substring-after(@href,'#')]">
  ....
</xsl:template

<xsl:template match="CrossReference">
  <!-- the ones that don't match will fall through to here -->
</xsl:template>

>
> I had read some place on the web that this xsl:if would work to let me
> know when a key did NOT find any value, but it doesn't seem to be being
> called. I get the xml file as it is.
>
> Is this the correct way to do this, or is there a better way?
>
> thanks for any help,
>
>
> Russ


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