Re: keep 2nd chapter element

Hi Jim,
   It seems to me _a grouping problem_, which can be
solved by Muenchian method.. 

The XSL for this would be --

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0"
encoding="UTF-8" indent="yes"/>

<xsl:key name="group-by-id" match="chapter" use="@id"
/> 
	
<xsl:template match ="/A">
  <xsl:for-each select="chapter">
    <xsl:if test="(generate-id(.) = generate-id(
key('group-by-id', @id)[1])) and not(@value = '0')">
      <xsl:copy-of select="." />
    </xsl:if>      
   </xsl:for-each>
</xsl:template>    
        
</xsl:stylesheet>

If the above XSL is applied to the XML --
<?xml version="1.0" encoding="UTF-8"?>
<A>
  <chapter id="BCV-MRK-0" value="0" />
  <chapter id="BCV-MRK-0" value="0" />
  <chapter id="BCV-MRK-1" value="1" />
  <chapter id="BCV-MRK-1" value="1" />
  <chapter id="BCV-MRK-1" value="1" />
  <chapter id="BCV-MRK-2" value="2" />
  <chapter id="BCV-MRK-2" value="2" />
  <chapter id="BCV-MRK-2" value="2" />
  <chapter id="BCV-MRK-2" value="2" />
  <chapter id="BCV-MRK-3" value="3" />
  <chapter id="BCV-MRK-3" value="3" />
  <chapter id="BCV-MRK-3" value="3" />
  <chapter id="BCV-MRK-3" value="3" />
</A>

(I have introduced a <A> tag to make the XML
well-formed, and have removed keep tags)

It produces output --
<chapter id="BCV-MRK-1" value="1"/>
<chapter id="BCV-MRK-2" value="2"/>
<chapter id="BCV-MRK-3" value="3"/>

I hope, this solution _was_ required.. I am not sure,
whether Michael Kay's solution solved the problem.. I
observed that the XPath expression Michael Kay wrote,
produced a different ouput.

Regards,
Mukul


--- Jim_Albright@xxxxxxxxxxxx wrote:
> reducing the problem to bare bones I want to keep
> only some of the 
> "chapter" elements and toss the rest:
>          <chapter id="BCV-MRK-0"  value="0"
> keep="no"/>
>          <chapter id="BCV-MRK-0"  value="0"
> keep="no"/>
>          <chapter id="BCV-MRK-1"  value="1"
> keep="yes"/>
>          <chapter id="BCV-MRK-1"  value="1"
> keep="no"/>
>          <chapter id="BCV-MRK-1"  value="1"
> keep="no"/>
>          <chapter id="BCV-MRK-2"  value="2"
> keep="no"/>
>          <chapter id="BCV-MRK-2"  value="2"
> keep="yes"/>
>          <chapter id="BCV-MRK-2"  value="2"
> keep="no"/>
>          <chapter id="BCV-MRK-2"  value="2"
> keep="no"/>
>          <chapter id="BCV-MRK-3"  value="3"
> keep="no"/>
>          <chapter id="BCV-MRK-3"  value="3"
> keep="yes"/>
>          <chapter id="BCV-MRK-3"  value="3"
> keep="no"/>
>          <chapter id="BCV-MRK-3"  value="3"
> keep="no"/>
> 
> I have added the keep attribute by hand to show
> which "chapter"s to keep
> so I should end with
>          <chapter id="BCV-MRK-1"  value="1"
> keep="yes"/>
>          <chapter id="BCV-MRK-2"  value="2"
> keep="yes"/>
>          <chapter id="BCV-MRK-3"  value="3"
> keep="yes"/>
> 
> 
> <xsl:template match="chapter"  >
>         <xsl:choose>
>         <!--...... if  chapter is zero then toss  
> .....-->
>                 <xsl:when test="@value='0'">
>                         <!--...... remove chapter 0
> .....-->
>                 </xsl:when>
>         <!--...... if very first chapter 1 in book
> then keep   .....-->
>                 <xsl:when test="@value='1' and 
> preceding::chapter[not(@value='1')]">
>                         <xsl:call-template
> name="copy-current-node"/>
>                 </xsl:when>
>         <!--...... if second occurrence of same
> value and value is not 1 
> then keep it  .....-->
>                 <xsl:when test=""><!-- not working
> yet-->
>                         <xsl:call-template
> name="copy-current-node"/>
>                 </xsl:when>
>                 <xsl:otherwise>
>                         <!--...... remove duplicate
> chapter  .....-->
>                 </xsl:otherwise>
>         </xsl:choose>
> </xsl:template>
> 
> 
> Jim Albright
> 704 843-0582
> Wycliffe Bible Translators
> 
> 
> 
>  XSL-List info and archive: 
> http://www.mulberrytech.com/xsl/xsl-list
> 


__________________________________
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
http://shopping.yahoo.com

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list