--- G. Ken Holman wrote:
At 2002-12-02 07:48 -0800, Artur Matysiak wrote:
does anybody know how to convert the following XML:
Below is a solution using variables and a solution using keys. Take
your
pick. Grouping algorithms are documented in the FAQ ... what aspects
of
the documentation did you find confusing?
I hope this helps.
...................... Ken
T:\ftemp>type artur.xml
<elems>
<elem id="1">
<elem id="1"/>
</elem>
<elem id="1">
<elem id="2"/>
</elem>
<elem id="2">
<elem id="1"/>
</elem>
<elem id="2">
<elem id="2"/>
</elem>
</elems>
[solution with xsl:variable skipped]
T:\ftemp>type artur2.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:output indent="yes"/>
<xsl:key name="elems" match="elem[elem]" use="@id"/>
<xsl:template match="elems">
<elems>
<xsl:for-each
select="elem[generate-id(.)=generate-id(key('elems',@id))]">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:copy-of select="key('elems',@id)/node()"/>
</xsl:copy>
</xsl:for-each>
</elems>
</xsl:template>
</xsl:stylesheet>
T:\ftemp>saxon artur.xml artur2.xsl
<?xml version="1.0" encoding="utf-8"?>
<elems>
<elem id="1">
<elem id="1"/>
<elem id="2"/>
</elem>
<elem id="2">
<elem id="1"/>
<elem id="2"/>
</elem>
</elems>
T:\ftemp>
T:\ftemp>
This solution will work only if the child "element"s have all unique
"id" attributes.
For example, when applied on the following source xml:
<elems>
<elem id="1">
<elem id="1"/>
<elem id="2"/> </elem>
<elem id="1">
<elem id="2"/> </elem>
<elem id="1">
<elem id="2"/> </elem>
<elem id="1">
<elem id="3"/> </elem>
<elem id="2">
<elem id="1"/> </elem>
<elem id="2">
<elem id="2"/> </elem>
</elems>
the result of the transformation is:
<?xml version="1.0" encoding="utf-8"?>
<elems>
<elem id="1">
<elem id="1"/>
<elem id="2"/>
<elem id="2"/>
<elem id="2"/>
<elem id="3"/>
</elem>
<elem id="2">
<elem id="1"/>
<elem id="2"/>
</elem>
</elems>
Probably I misunderstand the problem, but I think that the
re-structuring had to be accompanied by elimination of elements with
non-unique "id" attributes.
=====
Cheers,
Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL
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