At 2006-03-15 18:00 +0000, Nick Fitzsimons wrote:
Firstly, I'm using XSLT 1.0.
First in my response is "thank you for supplying test data".
The rules for grouping and sorting are fairly simple in the basic case:
Show Gorillas of priority greater than 2, sorted by priority, then by date
descending;
Show Chimpanzees of priority greater than 2, sorted by priority, then by
date descending;
Show Orangutans of priority greater than 2, sorted by priority, then by
date descending;
Show Bonobos of priority greater than 2, sorted by priority, then by date
descending;
...
However, I now have the further requirement that I return a single
<section> containing only the first three items (or fewer if less than
three match the "priority greater than 2" criterion).
...
how can I achieve the necessary grouping and sorting?
I see this only as a sorting issue, since you are returning the
result set in a single section.
I'm almost certain some
straightforward Muenchian grouping will suffice
If I have understood your requirement, it isn't necessary to use grouping.
I hope the code below helps.
. . . . . . . . . . Ken
T:\ftemp>type nick.xsl
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:nick="urn:x-nick"
exclude-result-prefixes="nick"
version="1.0">
<xsl:output indent="yes"/>
<nick:type-groupings>
<group type="Gorilla" order="1"/>
<group type="Chimpanzee" order="2"/>
<group type="Orangutan" order="3"/>
<group type="Bonobo" order="4"/>
</nick:type-groupings>
<xsl:template match="/">
<xsl:variable name="apes" select="/apes/ape"/>
<section>
<xsl:for-each select="$apes[(_at_)priority>2]">
<xsl:sort select="document('')/*/nick:type-groupings/
group[(_at_)type=current()/@type]/@order"
data-type="number"/>
<xsl:sort select="@priority" order="descending" data-type="number"/>
<xsl:sort select="substring(@date,7,4)" order="descending"/>
<xsl:sort select="substring(@date,4,2)" order="descending"/>
<xsl:sort select="substring(@date,1,2)" order="descending"/>
<xsl:if test="position()<=3">
<xsl:element name="{(_at_)type}">
<xsl:copy-of select="@priority | @date"/>
</xsl:element>
</xsl:if>
</xsl:for-each>
</section>
</xsl:template>
</xsl:stylesheet>
T:\ftemp>type nick1.xml
<apes>
<ape priority="5" date="25-01-2006" type="Chimpanzee" />
<ape priority="1" date="26-01-2006" type="Gorilla" />
<ape priority="2" date="29-01-2006" type="Chimpanzee" />
<ape priority="1" date="22-01-2006" type="Orangutan" />
<ape priority="3" date="22-01-2006" type="Bonobo" />
<ape priority="1" date="25-01-2006" type="Bonobo" />
<ape priority="4" date="24-01-2006" type="Gorilla" />
<ape priority="5" date="22-01-2006" type="Bonobo" />
<ape priority="4" date="26-01-2006" type="Chimpanzee" />
<ape priority="4" date="25-01-2006" type="Gorilla" />
<ape priority="2" date="25-01-2006" type="Bonobo" />
<ape priority="3" date="25-01-2006" type="Orangutan" />
<ape priority="1" date="25-01-2006" type="Bonobo" />
<ape priority="3" date="27-01-2006" type="Gorilla" />
<ape priority="1" date="25-01-2006" type="Chimpanzee" />
<ape priority="1" date="25-01-2006" type="Orangutan" />
</apes>
T:\ftemp>xslt nick1.xml nick.xsl con
<?xml version="1.0" encoding="utf-8"?>
<section>
<Gorilla priority="4" date="25-01-2006"/>
<Gorilla priority="4" date="24-01-2006"/>
<Gorilla priority="3" date="27-01-2006"/>
</section>
T:\ftemp>type nick2.xml
<apes>
<ape priority="5" date="25-01-2006" type="Chimpanzee" />
<ape priority="1" date="26-01-2006" type="Gorilla" />
<ape priority="2" date="29-01-2006" type="Chimpanzee" />
<ape priority="1" date="22-01-2006" type="Orangutan" />
<ape priority="3" date="22-01-2006" type="Bonobo" />
<ape priority="1" date="25-01-2006" type="Bonobo" />
<ape priority="5" date="22-01-2006" type="Bonobo" />
<ape priority="2" date="25-01-2006" type="Bonobo" />
<ape priority="3" date="25-01-2006" type="Orangutan" />
<ape priority="1" date="25-01-2006" type="Bonobo" />
<ape priority="3" date="27-01-2006" type="Gorilla" />
<ape priority="1" date="25-01-2006" type="Chimpanzee" />
<ape priority="1" date="25-01-2006" type="Orangutan" />
</apes>
T:\ftemp>xslt nick2.xml nick.xsl con
<?xml version="1.0" encoding="utf-8"?>
<section>
<Gorilla priority="3" date="27-01-2006"/>
<Chimpanzee priority="5" date="25-01-2006"/>
<Orangutan priority="3" date="25-01-2006"/>
</section>
T:\ftemp>
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