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RE: [xsl] Outputing a node whose value appears only once


Subject: RE: [xsl] Outputing a node whose value appears only once
From: Mukul Gandhi <mukul_gandhi@xxxxxxxxx>
Date: Mon, 18 Jul 2005 22:59:45 -0700 (PDT)

Hi Jonathan,
  I think you need this stylesheet! As Mike suggested
we need to use Muenchian grouping technique..

<?xml version="1.0"?> 
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
 
<xsl:output method="text" /> 

<xsl:key name="by-elem" match="a/* | c/*" use="." />
 
<xsl:template match="/root">
  <xsl:for-each select="(a/* | c/*)[generate-id() =
generate-id(key('by-elem',.)[1])][count(key('by-elem',.))
= 1]">
     <xsl:value-of select="."
/><xsl:text>&#xa;</xsl:text>
  </xsl:for-each>
</xsl:template>
 
</xsl:stylesheet>

Regards,
Mukul

--- Jonathan Marenus <jonathanmarenus@xxxxxxxxx>
wrote:

> 
> Ok, I kind of got your point thus far. In my
> example,
> I had two parents, 'a' and 'c'.  How would I go
> about
> outputing what is in 'a' and not 'c' separately from
> outputing what is in 'c' but not 'a'.  In other
> words,
> I want to run my XSL to account for both the unique
> values in 'a' as well as the unique values in 'c'. 
> 
> --- Michael Kay <mike@xxxxxxxxxxxx> wrote:
> 
> > Read about Muenchian grouping at
> > http://www.jenitennison.com/xslt/grouping.
> > You can use the same idea to test whether a value
> is
> > unique within the file
> > (a member of a group of one) by defining the
> > grouping key
> > 
> > <xsl:key name="gk" match="b|bb|bbb" use="."/>
> > 
> > and testing a node
> > 
> > <xsl:template match="b|bb|bbb">
> >   <xsl:if test="not(key('gk', .)[2])">
> >     The value is unique
> >   </xsl:if>
> > </xsl:template>
> > 
> > Michael Kay
> > http://www.saxonica.com/
> >  
> > 
> > > -----Original Message-----
> > > From: Jonathan Marenus
> > [mailto:jonathanmarenus@xxxxxxxxx] 
> > > Sent: 18 July 2005 23:35
> > > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > > Subject: [xsl] Outputing a node whose value
> > appears only once
> > > 
> > > 
> > > What I would like to do now is output a value
> that
> > > appears only once throughout the XML file. For
> > > example, if I have:
> > > 
> > > <a>
> > >    <b>value1</b>
> > >    <bb>value2</bb>
> > >    <bbb>value3</bbb>
> > > </a>
> > > <c>
> > >    <b>value1</b>
> > >    <bb>value2</bb>
> > >    <bbb>value4</bbb>
> > > </c>
> > > 
> > > From the point of view of 'a', I would want to
> > output
> > > "value3" because 'a' contains it but 'c' does
> not.
> > 
> > > This is assuming that the above is the entire
> > file.  I
> > > also need to output a sibling of the node which
> > does
> > > not appear more than once (like the value of a/b
> > or
> > > a/bbb).  It is also assumed that multiple
> > instances of
> > > the same value will have different parents. 
> This
> > is
> > > shown in the example above.
> > > 
> > > Thanks for the help.
> > > 
> > > Jonathan


		
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