Re: Outputing a node whose value appears only once

I am trying to eliminate duplicates with the following
logic..

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

<xsl:template match="/root">
   <xsl:for-each select="(a/* | c/*)[not((. =
preceding-sibling::a) | (. = preceding-sibling::c) |
(. = following-sibling::a) | (. =
following-sibling::a))]">
     <xsl:value-of select="." />
   </xsl:for-each>
</xsl:template>
 
</xsl:stylesheet>

Saxon 8.4 is giving error -
Error on line 7 of
file:/C:/xml/xsleg/xslt/example1.xsl:
  XPTY0004: Required item type of first operand of '|'
is node(); supplied value
 has item
  type xs:boolean

Whereas Xalan-J 2.6.0 gives following error -
Error at xsl:for-each on line 7 of
file:///C:/xml/xsleg/xslt/example1.xsl:
  The value is not a node-set

Can anyone tell where is the problem? And how I can
solve it?

Regards,
Mukul

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

> 
> 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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