Re: pattern matching in xslt

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At 13:32 23/4/02, David Nelson wrote:
>I would sincerely apprec. any help you might offer.  What I need to do is
>tokenize a node value into chunks, filter the trash and return in the xml,
>the new clean string. I'm a newbie with xslt and am having a tough time
>deciphering how to accomplish this.

This (string processing) is not XSLT's strong suit, which is probably why 
you're having trouble finding the cookbook solution.

There are two ways to approach it.  One, which is probably more efficient, 
is to use extension functions; you can just access the various Java string 
functions directly.

The "pure" way to do it is to use a recursive function; something like

<xsl:template match="description">
   <xsl:call-template name="process-text">
     <xsl:with-param name="string" select="."/>
   </xsl:call-template>
</xsl:template>

<xsl:template name="process-text">
   <xsl:param name="string" select="''"/>
   <xsl:choose>
     <xsl:when test="not(contains($string, '.. '))">
       <xsl:value-of select="$string"/>
     </xsl:when>
     <xsl:otherwise>
       <xsl:value-of
         select="substring-before($string, '.. ')"/>
       <xsl:call-template name="process-text">
         <xsl:with-param name="string"
           select="substring-after($string, '.. ')"/>
       </xsl:call-template>
     </xsl:otherwise>
   </xsl:choose>
</xsl:template>

~Chris
- -- 
Christopher R. Maden, Principal Consultant, crism consulting
DTDs/schemas - conversion - ebooks - publishing - Web - B2B - training
<URL: http://crism.maden.org/consulting/ >
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