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Re: Can this hard-coded template be generalized?
Subject: Re: Can this hard-coded template be generalized?
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 02 Oct 2011 16:37:45 -0400
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At 2011-10-02 13:00 -0700, Mark wrote:
Below are two abbreviated but complete files.
They produce the HTML output I want, but only by hard coding my XSLT
stylesheet (the code in question is in <xsl:template name="page">).
The stylesheet writes to the working directory.
Note that I have hardcoded the numbers 105, 106, 107, and 108 from
the data (the XML file is below the stylesheet.
Either the data is too impoverished for me to accomplish my end, or
I am too inexperienced at XPath to generalize the code.
How do you want it generalized? What, in a sentence, did you want to
reflect abstractly that using the hard-coded numbers achieves.
For example, I was able to quickly reproduce your results with this
much shorter stylesheet:
<?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:cps="http://www.cpslib.org"
exclude-result-prefixes="xs cps" version="2.0">
<xsl:template match="Stamp">
<xsl:result-document
href="{../@year}-{CatNumbers/@pofis-number}.htm">
<html>
<head/>
<body>
<a lang="en" class="button"
href="{Formats/@complex}s.htm">Se-tenant</a>
<a lang="cz" class="button"
href="{Formats/@complex}s.htm">Spojky</a>
</body>
</html>
</xsl:result-document>
</xsl:template>
</xsl:stylesheet>
As before, it doesn't do any string decomposition after
composition. Nor any un-grouping after grouping. And no tunneling
was needed, nor even creating any variable and passing it as a
subroutine as I was able to go and get the values as needed. I was
looking at it declaratively and thinking about where to find tree
nodes when needed.
But ... the code above seems too simple to reflect what you might
have been trying with the grouping, so I have no idea if it will help
you or not.
And I wasn't trying to be cryptic, just reducing creating variables
where they weren't going to be reused often enough.
Note how in some (not all) instruction attributes (above in
xsl:result-document/@href) and in all literal result element
attributes (above in a/@href) you can mix multiple attribute value
templates and boilerplate text strings to compose the attribute's
value. You don't have to use concat() as you did below.
I hope this helps.
. . . . . . . . . . . Ken
Thanks,
Mark
-----------------------
The XSLT stylesheet:
<?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:cps="http://www.cpslib.org"
exclude-result-prefixes="xs cps" version="2.0">
<xsl:template match="Set">
<xsl:apply-templates>
<xsl:with-param name="page-name-stem" tunnel="yes"
select="concat(@year, '-')"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="Stamp">
<!-- Write out the stamp page -->
<xsl:variable name="base-number" select="CatNumbers/@pofis-number"/>
<xsl:call-template name="page">
<xsl:with-param name="file-type" select="concat($base-number, '.htm')"/>
</xsl:call-template>
</xsl:template>
<xsl:template name="page">
<xsl:param name="file-type"/>
<xsl:param name="page-name-stem" tunnel="yes"/>
<xsl:result-document href="{concat($page-name-stem, $file-type)}">
<html>
<head/>
<body>
<xsl:for-each-group select="../Stamp/Formats" group-by="@complex">
<xsl:variable name="file-name" select="concat(@complex,
's.htm')"/>
<!-- Hardcode starts here -->
<xsl:if test="@complex eq '105' and
(cps:extract-number($file-type) eq '105' or
cps:extract-number($file-type) eq '106')">
<a lang="en" class="button" href="{$file-name}">Se-tenant</a>
<a lang="cz" class="button" href="{$file-name}">Spojky</a>
</xsl:if>
<xsl:if test="@complex eq '107' and
(cps:extract-number($file-type) eq '107' or
cps:extract-number($file-type) eq '108')">
<a lang="en" class="button" href="{$file-name}">Se-tenant</a>
<a lang="cz" class="button" href="{$file-name}">Spojky</a>
</xsl:if>
</xsl:for-each-group>
</body>
</html>
</xsl:result-document>
</xsl:template>
<xsl:function name="cps:extract-number">
<xsl:param name="data"/>
<xsl:value-of select="replace($data, '\P{N}', '')"/>
</xsl:function>
</xsl:stylesheet>
------------------------------
The XML:
<?xml version="1.0" encoding="UTF-8"?>
<Set domain="cr" year="1996" month="3" day="27">
<Stamp>
<CatNumbers pofis-number="105"/>
<Formats souvenir-sheet="105"/>
<Formats complex="105"/>
</Stamp>
<Stamp>
<CatNumbers pofis-number="106"/>
<Formats souvenir-sheet="105"/>
<Formats complex="105"/>
</Stamp>
<Stamp>
<CatNumbers pofis-number="107"/>
<Formats souvenir-sheet="105"/>
<Formats complex="107" />
</Stamp>
<Stamp>
<CatNumbers pofis-number="108"/>
<Formats souvenir-sheet="105"/>
<Formats complex="107" />
</Stamp>
</Set>
--
Contact us for world-wide XML consulting and instructor-led training
Crane Softwrights Ltd. http://www.CraneSoftwrights.com/s/
G. Ken Holman mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
Google+ profile: https://plus.google.com/116832879756988317389/about
Legal business disclaimers: http://www.CraneSoftwrights.com/legal
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