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Re: Recursive xsl parsing.
- To: xsl-list at lists dot mulberrytech dot com
- Subject: Re: [xsl] Recursive xsl parsing.
- From: Francis Norton <francis at redrice dot com>
- Date: Fri, 12 Jan 2001 10:27:17 +0000
- References: <001901c07c06$a359c030$35f0e840@devel>
- Reply-To: xsl-list at lists dot mulberrytech dot com
Gurvan LeClecH wrote:
>
> Our
> objective is to recursively parse all documents until there are no more
> links to follow, and no more documents to parse.
>
Here's a solution that works using pure XSLT (see
http://www.netcrucible.com/xslt/msxml-faq.htm if you're still using
Microsoft's previous experimental implementation).
The context is working with XML Schemas which can include other schemas
via an xsd:include element. The code is quite satisfactory in the sense
that by using nodesets it recurses through the include tree in a
parallel wave-front, rather than having to zip-zag sequentially round
every twist in the twig line :)
Francis.
<xsl:template name="gatherSchema">
<xsl:param name="schemas"/>
<xsl:param name="includes"/>
<xsl:choose>
<xsl:when test="count($schemas) < count($schemas | $includes)">
<!-- when $includes includes something new, recurse ... -->
<xsl:call-template name="gatherSchema">
<!-- ... with current $includes added to the $schemas parameter
... -->
<xsl:with-param name="schemas" select="$schemas | $includes"/>
<!-- ... and any *new* includes in the $include parameter -->
<xsl:with-param name="includes"
select="document($includes/xsd:schema/xsd:include/@schemaLocation)"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<!-- do something with the "$schemas" nodeset containing the root
nodes of all included schemas -->
</xsl:otherwise>
</xsl:choose>
</xsl:template>
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