Here is the filter() function of FXSL (written around 2003/2004):
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:f="http://fxsl.sf.net/";
exclude-result-prefixes="f xs"
<xsl:import href="func-apply.xsl"/>
<xsl:function name="f:filter" as="item()*">
<xsl:param name="pList" as="item()*"/>
<xsl:param name="pController" as="element()"/>
<xsl:sequence select="$pList[f:apply($pController, .)]"/>
</xsl:function>
</xsl:stylesheet>
the $pController is a "template reference". When it is applied to an
item of the sequense $pList, it returns true() or false(), using
whatever logic is needed for that and we (f:filter() ) don't care and
don't know / cannot anticipate that.
Here is a simple example (testFunc-filter.xsl in the distribution of
FXSL 2.x) using f:filter():
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:f="http://fxsl.sf.net/";
exclude-result-prefixes="f"
<xsl:import href="../f/func-filter.xsl"/>
<xsl:import href="../f/func-Operators.xsl"/>
<xsl:import href="../f/func-standardXpathFunctions.xsl"/>
<xsl:import href="../f/func-flip.xsl"/>
<xsl:import href="../f/func-compose.xsl"/>
<!--
Expected result:
Filtering by IsEven:
2 4 6 8 10
-->
<xsl:output indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="/">
Filtering by IsEven:
<xsl:sequence select="f:filter(1 to 10, f:compose(f:not(),
f:flip(f:mod(),2)))"/>
</xsl:template>
</xsl:stylesheet>
When the above transformation is applied (on any source xml -- not
used) the expected result is produced:
"
Filtering by IsEven:
2 4 6 8 10
"
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
On Fri, Jan 8, 2010 at 9:27 AM, Eliot Kimber <ekimber(_at_)reallysi(_dot_)com>
wrote:
On 1/8/10 11:25 AM, "Dimitre Novatchev" <dnovatchev(_at_)gmail(_dot_)com>
wrote:
I personally would use a function (predicate that decides if something
is a "chapter") passed as a parameter (function-item in 2.1 speak).
Can you provide an example of how that would work?
Thanks,
E.
--
Eliot Kimber
Senior Solutions Architect
"Bringing Strategy, Content, and Technology Together"
Main: 610.631.6770
www.reallysi.com
www.rsuitecms.com
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