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Re: unique elements from different sourcefile

Subject: Re: unique elements from different sourcefile
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 03 Jan 2002 10:04:19 -0500
xslt unique elements
At 2002-01-03 14:31 +0100, Thomas Winkler wrote:
i'm really having a hard time figuring this little problem. because of
simplicity and performance i used the muench method for finding unique
elements and whatever else i needed. but this one just doesn't work for
me.

I think because you need local scope for grouping.


all i want is getting all possible children of a specific element. since
the content model of some elements can be very complicated (such as
"head"), most xpath axis don't work.

I see you are looking for unique descendents of each element ... I see that as a grouping within scope problem as well as the other post today (is it me, or does everything look like a nail today?).


i think i have to use at least two for loops,

No, I think you just have to scope your grouping within the apex of what you need to be grouped.


what do my xsl:key and xsl:for-each(s) have to look like. i tried many
things, i just don't want to write here.

I wouldn't use keys here, I again see this as a "grouping with variables" problem.


I hope the code below helps.

.................... Ken


U:\utemp\winkler>type winkler.xml <dtd> <element name="head" content-type="element"> <content-model-expanded> <sequence-group> <or-group occurrence="*"> <element-name name="meta"/> <element-name name="link"/> <element-name name="object"/> </or-group> <or-group> <sequence-group> <element-name name="title"/> <or-group occurrence="*"> <element-name name="meta"/> <element-name name="link"/> <element-name name="object"/> </or-group> <sequence-group occurrence="?"> <element-name name="base"/> <or-group occurrence="*"> <element-name name="meta"/> <element-name name="link"/> <element-name name="object"/> </or-group> </sequence-group> </sequence-group> <sequence-group> <element-name name="base"/> <or-group occurrence="*"> <element-name name="meta"/> <element-name name="link"/> <element-name name="object"/> </or-group> <sequence-group> <element-name name="title"/> <or-group occurrence="*"> <element-name name="meta"/> <element-name name="link"/> <element-name name="object"/> </or-group> </sequence-group> </sequence-group> </or-group> </sequence-group> </content-model-expanded> </element> </dtd>

U:\utemp\winkler>type winkler.xsl
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">

<xsl:output indent="yes"/>

<xsl:template match="/*">
  <xsl:for-each select="element">
    <xsl:sort name="@name"/>
    <element name="{@name}">
      <xsl:variable name="all-children" select=".//element-name"/>
      <xsl:for-each select="$all-children">
        <xsl:sort name="@name"/>
        <xsl:if test="generate-id(.)=
                      generate-id($all-children[@name=current()/@name])">
          <child-element name="{@name}"/>
        </xsl:if>
      </xsl:for-each>
    </element>
  </xsl:for-each>
</xsl:template>

</xsl:stylesheet>

U:\utemp\winkler>xt winkler.xml winkler.xsl
<?xml version="1.0" encoding="utf-8"?>
<element name="head">
<child-element name="meta"/>
<child-element name="link"/>
<child-element name="object"/>
<child-element name="title"/>
<child-element name="base"/>
</element>


-- Training Blitz: 3-days XSLT/XPath, 2-days XSLFO - Feb 18-22, 2002

G. Ken Holman                mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
Crane Softwrights Ltd.         http://www.CraneSoftwrights.com/s/
Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (Fax:-0995)
ISBN 0-13-065196-6                        Definitive XSLT & XPath
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