Re: [xsl] Problem with xsl:if

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Hi Gerald,

At 12:04 PM 4/21/2004, you wrote:
> I have the following XML Document:
>
> <?xml version="1.0" encoding="UTF-8"?>
>    <input>
>       <add class-name="User">
>          <add-attr attr-name="jkuSLABS">
>             <value>90</value>
>          </add-attr>
>          <add-attr attr-name="jkuSLART">
>             <value>50</value>
>          </add-attr>
>          <add-attr attr-name="jkuPeHabd">
>             <value type="string">7777-33-11</value>
>          </add-attr>
>       </add>
>    </input>
>
>
> What Id like to to is the get an output document which should contain
> the
>          <add-attr attr-name="jkuPeHabd">
>             <value type="string">7777-33-11</value>
>          </add-attr>
> only, if the jkuSLABS=90 AND jkuSLART=50. Otherwise the 3 lines should
> be omitted.
>
> I thought of the following, but I think I am misunderstanding
> something:
>
>         <xsl:template match="node()|@*">
>                 <xsl:copy>
>                         <xsl:apply-templates select="@*|node()"/>
>                 </xsl:copy>
>         </xsl:template>
>         <xsl:template match="*[@attr-name='jkuPeHabd']">
>                 <xsl:variable name="slart"
> select="//*[@attr-name='jkuPeBeschSAP22SLART']//value"/>
>                 <xsl:variable name="slabs"
> select="//*[@attr-name='jkuPeBeschSAP22SLABS']//value"/>
>
>                 <xsl:if test="($slart!='50')   or   ($slabs!='90')">
>                 </xsl:if>
>         </xsl:template>
>
> As far as I can see the if never gets true, but still if it would be
> true, I would need some "else" operation. Maybe you can give me a hint
> how to solve this.

The reason $slart != 50 never gets true is ... well it's impossible to say 
without looking at your entire data set, since you have bound $slart to

//*[@attr-name='jkuPeBeschSAP22SLART']//value

-- which is to say, a whole lot of nodes. This XPath translates as "a value 
anywhere inside an element with @attr-name=''jkuPeBeschSAP22SLART' 
appearing anywhere in the document", but that's not what you want, I think.

From your description, I think you want

../*[@attr-name='jkuSLABS']/value

which is to say the value child of the element child with 
@attr-name='jkuSLABS' of my parent.

Then I think you simply need

<xsl:if test="($slart = '50') and ($slabs = '90')">
  <xsl:copy-of select="."/><!-- copy me and my descendants -->
</xsl:if>

with no 'else' since your 'else' case is to do nothing.

I hope that helps! First, take a hard look at an XPath tutorial and try to 
determine why the XPaths you created will *not* work ... don't just guess; 
look it up.

Cheers,
Wendell


======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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