Re: [xsl] analyze-string question

["Imsieke, Gerrit, le-tex" <gerrit.imsieke@xxxxxxxxx>]

David,

When I revisited the solution that I proposed, I noticed some redundancy 
(xsl:choose) in the function my:wrap-nested. Please find the reworked 
solution below.

Th solution succeeds at nesting the alts by virtue of the greediness of 
the '.+' regex. If there is no prior markup in an alt group (no 
<stress>, in particular), it will select the outermost bracket pair and 
then process whats between the brackets recursively.

But it cannot, unfortunately, mitigate the risk of ambiguous input (when 
alt forms are allowed to start with vowels and when there are no other 
rules to unequivocally discern stressing markup from alt markup).

Gerrit


<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  xmlns:xs="http://www.w3.org/2001/XMLSchema";
  xmlns:my="my"
  version="2.0"
  exclude-result-prefixes="my xs"
  >

  <xsl:template match="p">
    <xsl:copy>
      <xsl:sequence select="my:wrap-nested(., '&lt;([^aeiou].+)&gt;')"/>
    </xsl:copy>
  </xsl:template>

  <xsl:function name="my:wrap-nested" as="node()*">
    <xsl:param name="string" as="xs:string" />
    <xsl:param name="regex" as="xs:string" />
    <xsl:analyze-string select="$string" regex="{$regex}" flags="i">
      <xsl:matching-substring>
        <alt>
          <xsl:sequence select="my:wrap-nested(regex-group(1), $regex)"/>
        </alt>
      </xsl:matching-substring>
      <xsl:non-matching-substring>
        <xsl:sequence select="my:stress(.)"/>
      </xsl:non-matching-substring>
    </xsl:analyze-string>
  </xsl:function>

  <xsl:function name="my:stress" as="node()*">
    <xsl:param name="string" as="xs:string" />
    <xsl:analyze-string select="$string" regex="&lt;([aeiou])" flags="i">
      <xsl:matching-substring>
        <stress>
          <xsl:value-of select="regex-group(1)"/>
        </stress>
      </xsl:matching-substring>
      <xsl:non-matching-substring>
        <xsl:value-of select="."/>
      </xsl:non-matching-substring>
    </xsl:analyze-string>
  </xsl:function>

</xsl:stylesheet>



On 2012-10-27 14:45, Birnbaum, David J wrote:
> Dear XSLT List,
>
> Thanks very much to Michael and Gerrit for their quick and helpful responses, which do, indeed, point to an effective solution.
>
> Best,
>
> David

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Gerrit Imsieke
Geschdftsf|hrer / Managing Director
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gerrit.imsieke@xxxxxxxxx, http://www.le-tex.de

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