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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Flat puzzle. (Re: <xsl:stylesheet xmlns...)
 Paul,
| This is very good. I wish you already got something like
| 'Flat puzzle' described below.
Not 100% sure what you want, but this stylesheet illustrates
a way to get the basic result you're looking for. Given
an input document like:
<LIST>
<A>content</A>
<B dep="A">content</B>
<C dep="B">content</C>
<D/>
<E dep="nowhere"/>
<X>content</X>
<Y dep="X">content</Y>
<Z dep="Y">content</Z>
<Q dep="C">content</Q>
</LIST>
It produces:
<html>
<body>
<h2>A B C Q</h2>
<ol>
<li>A</li>
<li>B</li>
<li>C</li>
<li>Q</li>
</ol>
<!--
| wasn't sure if you wanted
| something with no deps to show
| as the only thing under it's heading
| or to not have anything show...
+>
<h2>D</h2>
<ol>
<li>D</li>
</ol>
<h2>X Y Z</h2>
<ol>
<li>X</li>
<li>Y</li>
<li>Z</li>
</ol>
</body>
</html>
Here's the stylesheet. With some minor tweaking it
should be able to be coaxed into what you're looking
for. At the moment it's not picking up the <E/> element
but this could be done, too, with a little more work.
Just wanted to show the basic idea. I initially
developed it with the OracleXSL engine, but then
later changed the 'ora' prefix to map to the Saxon
namespace and tested it with Saxon, too.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ora="http://icl.com/saxon"
exclude-result-prefixes="ora">
<xsl:output method="html"/>
<!-- Index <LIST> children by their dep attribute for fast lookups -->
<xsl:key name="dep" match="LIST/*" use="@dep"/>
<xsl:template match="LIST">
<html>
<body>
<!-- For each LIST child element with no dep attribute -->
<xsl:for-each select="*[not(@dep)]">
<!-- Collect dependency chain for current element into a variable -->
<xsl:variable name="deps">
<xsl:call-template name="selfdeps">
<xsl:with-param name="n" select="."/>
</xsl:call-template>
</xsl:variable>
<!-- Convert result tree fragment into nodeset for processing -->
<xsl:variable name="deps-set" select="ora:node-set($deps)"/>
<!-- Create space-separated title for the header -->
<xsl:variable name="title">
<xsl:for-each select="$deps-set/*">
<xsl:value-of select="name(.)"/>
<xsl:if test="position()!=last()">
<xsl:text> </xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<!-- Print the header -->
<h2><xsl:value-of select="$title"/></h2>
<!-- Print the list of dependencies including initial element -->
<ol>
<xsl:for-each select="$deps-set/*">
<li><xsl:value-of select="name(.)"/></li>
</xsl:for-each>
</ol>
</xsl:for-each>
</body>
</html>
</xsl:template>
<xsl:template name="selfdeps">
<xsl:param name="n"/>
<!-- Copy the current element into the result tree fragment -->
<xsl:copy-of select="$n"/>
<!-- If there are some dependencies, recurse to copy them -->
<xsl:if test="count(key('dep',name($n)))>0">
<xsl:call-template name="selfdeps">
<xsl:with-param name="n" select="key('dep',name($n))[1]"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
______________________________________________________________
Steve Muench, Lead XML Evangelist & Consulting Product Manager
BC4J & XSQL Servlet Development Teams, Oracle Rep to XSL WG
Author "Building Oracle XML Applications", O'Reilly
http://www.oreilly.com/catalog/orxmlapp/
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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