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RE: Counting Child Nodes?

Subject: RE: Counting Child Nodes?
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Mon, 22 Oct 2007 00:21:24 +0100
RE: Counting Child Nodes?
There were so many problems with your previous code that we may have failed
to spot the one that was causing the trouble. I'm a bit reluctant to offer
more advice since you haven't yet implemented the suggestions I already
made, however:

Your <book> element has two <p> children. Therefore in the expression 


assuming that the context node is the <book> element, an XSLT 2.0 processor
will report an error because the argument of string-length must be a single
value. (If the context node isn't the <book>, then child::p makes even less
sense.) A 1.0 processor will simply take the length of the first p child.
This doesn't seem to be what you had in mind.

Michael Kay

> -----Original Message-----
> From: Alice Ju-Hsuan Wei [mailto:ajwei@xxxxxxxxxxx] 
> Sent: 21 October 2007 15:40
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: Counting Child Nodes?
> Hi,
>   Thanks to all of you who helped pitch in to make this code 
> work. Now, this code is basically working, but I don't know 
> why it generates the background image as either _med.png or 
> _large.png, while those with string length smaller than 25 
> characters still generate the second <xsl:if> statement, by 
> generating the _med.png just the same as the second condition.
>   Is this another boolean problem I am having? Any suggestions?
> Thanks in advance.
> Alice
> XML:
> <book topic="Technology" rendition="xslt" author="Tennison, Jeni"
> title="Beginning XSLT">
>      <p>New York: Apress, 2002.</p>
>      <p>The book serves as an introduction to XSLT based on 
> the examples of a television program set. A resourceful book 
> for those new to the technology.</p>
>    </book>
> <xsl:choose>
>                     <xsl:when test="$rendition!=''">
>                         <div>
>                             <xsl:attribute name="class">
>                                 <xsl:value-of select="$rendition"/>
>                             </xsl:attribute>
>                             <xsl:if 
> test="string-length(child::p)&lt;'25'">
>                                 <xsl:attribute name="style"> 
> background-image:url('<xsl:value-of
> select="./@rendition"/>.png') </xsl:attribute>
>                             </xsl:if>
>                             <xsl:if 
> test="string-length(child::p)&lt;'75'">
>                                 <xsl:if 
> test="string-length(child::p)&gt;'25'">
>                                     <xsl:attribute 
> name="style"> background-image:url('<xsl:value-of
> select="./@rendition"/>_med.png') </xsl:attribute>
>                                 </xsl:if>
>                             </xsl:if>
>                             <xsl:if
>                                 test="(count(child::p) &gt; '1') or
> (string-length(p) &gt; '100') ">
>                                 <xsl:attribute name="style"> 
> background-image:url('<xsl:value-of
> select="./@rendition"/>_large.png') </xsl:attribute>
>                             </xsl:if>
>                             <p>
>                                 <xsl:call-template name="rend"/>
>                                 <xsl:apply-templates/>
>                             </p>
>                         </div>
>                     </xsl:when>
>                     <xsl:otherwise>
>                         <span>
>                             <xsl:call-template name="rend"/>
>                             <xsl:apply-templates/>
>                         </span>
>                     </xsl:otherwise>
>                 </xsl:choose>

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