Subject: Re: [xsl] Generating numeric character references From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> Date: Tue, 14 Jan 2003 16:55:08 -0500 |
Cheers, Wendell
I'd like to transform specific text subtrings into numeric character references during in an XSLT transformation. For example, I want to transform all occurrences that look like "&#173;" within a string into "­".
Here's the back story. I have source XML that is generated automatically from HTML by a third-party. The third-party incorrectly handles entity references, so that "­" in the original HTML in becomes "&#173;" in the XML. I want to restore the damage done. To simplify things, I am only interested in documents with ISO 8859-1 encoding.
Below is a solution [1] that I am not pleased with. It is a named template that recursively parses a string, trying to replace references. This requires an <xsl:when> element for each value of numeric character reference that might be encountered (see the "additional cases here" comment). Problems with this include linear search of values, omitted values, and opportunity for error in mismatched values.
Can anyone suggest a better approach to generating numeric character references? I am would be fine restricting the solution to MSXML or .NET's System.Xml.Xsl XSLT processors, if that is an issue.
Many thanks!
Cheers, Stuart
[1] A less than happy solution:
<xsl:template name="restoreNumCharRefs"> <xsl:param name="string"/>
<xsl:choose> <xsl:when test="contains($string, '&')"> <xsl:variable name="head" select="substring-before($string, '&')"/> <xsl:variable name="remainder" select="substring-after($string, '&')"/> <xsl:variable name="reference" select="substring-before($remainder, ';')"/>
<xsl:variable name="entity"> <xsl:choose> <xsl:when test="$reference='#167'">§</xsl:when> <xsl:when test="$reference='#173'">­</xsl:when>
<!-- additional cases here -->
<xsl:otherwise>&<xsl:value-of select="$reference"/>;</xsl:otherwise> </xsl:choose> </xsl:variable>
<xsl:variable name="tail"> <xsl:call-template name=" restoreNumCharRefs"> <xsl:with-param name="string" select="substring-after($remainder, ';')"/> </xsl:call-template> </xsl:variable>
<xsl:value-of select="concat($head, $entity, $tail)"/> </xsl:when> <xsl:otherwise> <xsl:value-of select="$string"/> </xsl:otherwise> </xsl:choose>
</xsl:template>
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
====================================================================== 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 ---------------------------------------------------------------------- Mulberry Technologies: A Consultancy Specializing in SGML and XML ======================================================================
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