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for-each problem

From: juergen <bbembi_de@-----.-->
To: NULL
Date: 10/1/2005 8:24:00 PM

Hallo everyone,

I really can't figure this out.

I want to do the following:
I want to know if a string is more than once in al list of strings.

i have a xml like this:

<root>
   <AAA id="1">
     <posNr>A1234</posNr>
   </AAA>
   <BBB id="1">
     <posNr>A1234</posNr>
   </BBB>
.
.
.

I now want to know if there is a element with a specific posNr twice in the list.
I do that:

<xsl:variable name="PosNrs">
   <xsl:copy-of select="/root//posNr"/>
</xsl:variable>

then:

<xsl:for-each select="$PosNrs">
...
</xsl:for-each>

But i get an error. why?
I can't get the for-each to work.
besides i don't know how to get the current item if that would work.

with xslt 2.0 this would be easy.
<xsl:variable name="foundPosNumsIndezes" select="index-of($PosNrs, posNr)"/>
   <xsl:choose>
     <xsl:when test="count($foundPosNumsIndezes) &gt; 1">
....

can anyone help me please.
thanks very much.

greetings juergen

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