At 2004-03-02 08:43 -0800, James A. Robinson wrote:
The feature can contain multiple configs,
each of which I want to merge across features:
...
I want to be able to select /config_datastore/site/* and perform selective
grouping (on feature @name) and merging (on the feature/config elements)
to return:
...
I found I could wrap my head around this problem using variables instead of
keys. An example is below giving your desired results. Note how I take
advantage of the node-set comparison of a single value to a set of values
to get from all configs only those whose feature's name is in a set of names.
I hope this helps.
.................... Ken
T:\ftemp>type jim.xml
<?xml version="1.0"?>
<config_datastore>
<feature name="a">
<config id="1">
<param id="x">x</param>
</config>
<config id="2">
<param id="xx">xx</param>
</config>
<config id="3">
<param id="xxx">xxx</param>
</config>
</feature>
<feature name="b">
<config id="1">
<param id="y">y</param>
</config>
<config id="2">
<param id="yy">yy</param>
</config>
</feature>
<feature name="c">
<config id="1">
<param id="z">z</param>
</config>
<config id="2">
<param id="zz">zz</param>
</config>
</feature>
<site>
<has_feature name="a"/>
<has_feature name="c"/>
</site>
</config_datastore>
T:\ftemp>type jim.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:template match="/">
<result>
<xsl:variable name="configs"
select="/*/feature[(_at_)name=/*/site/has_feature/@name]/config"/>
<xsl:for-each select="$configs">
<xsl:if test="generate-id(.)=
generate-id($configs[(_at_)id=current()/@id])">
<config id="{(_at_)id}">
<xsl:copy-of select="$configs[(_at_)id=current()/@id]/*"/>
</config>
</xsl:if>
</xsl:for-each>
</result>
</xsl:template>
</xsl:stylesheet>
T:\ftemp>saxon jim.xml jim.xsl
<?xml version="1.0" encoding="utf-8"?>
<result>
<config id="1">
<param id="x">x</param>
<param id="z">z</param>
</config>
<config id="2">
<param id="xx">xx</param>
<param id="zz">zz</param>
</config>
<config id="3">
<param id="xxx">xxx</param>
</config>
</result>
T:\ftemp>rem Done!
--
US XSL training: Washington,DC March 15; San Francisco,CA March 22
World-wide on-site corporate, government & user group XML training
G. Ken Holman mailto:gkholman(_at_)CraneSoftwrights(_dot_)com
Crane Softwrights Ltd. http://www.CraneSoftwrights.com/s/
Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (F:-0995)
Male Breast Cancer Awareness http://www.CraneSoftwrights.com/s/bc
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list