David,
     you are right. It has a performance impact which
I can see. As I hardly work on XSLT so never get any
chance to look into performance. 
To clarify, $leverreference contains "id" values and
profession contains id and name values. I need to
retrieve names from profession depending upon id
values in $leverreference RTF and display only unique
names with number of occurrence. I would appreciate
for any suggestion on performance.

regards.
Ranjan
I have atleast used 3 RTF to get the result. 
--- David Carlisle <davidc@xxxxxxxxx> wrote:

> 
> 
>    
>    I have a RTF with following declaration
>    <xsl:variable name="professionLevel"> 
>        <xsl:for-each select="//profession">
>          <xsl:variable name="nameval"
> select="@name"/>
>          <xsl:variable name="parentval"
> select="@parent"/>
>          <xsl:for-each
>                            
> select="exslt:node-set($leverreference)/*">
>            <xsl:variable name="referid"
> select="@levelref"/>
>            <xsl:if test="$referid=$parentval">
>              <xsl:copy>
>                <xsl:copy-of select="$nameval"/>
>              </xsl:copy>
>            </xsl:if>
>          </xsl:for-each>
>        </xsl:for-each>
>    </xsl:variable>
>    
> 
> That looks a very strange definition. The select
> expression on your
> inner fo-each doesn't depend on the current node so
> you will iterate
> over all of $leverreference)/* repeatedly, as many
> times as you have 
> profession elements in your original source, is that
> really what you
> want?
> 
> The above is euivalent to
> 
>    <xsl:variable name="professionLevel"> 
>        <xsl:for-each select="//profession">
>          <xsl:variable name="nameval"
> select="@name"/>
>          <xsl:variable name="parentval"
> select="@parent"/>
>          <xsl:for-each
>                            
>
select="exslt:node-set($leverreference)/*[@levelref=$parentval]">
>              <xsl:copy>
>                <xsl:copy-of select="$nameval"/>
>              </xsl:copy>
>          </xsl:for-each>
>        </xsl:for-each>
>    </xsl:variable>
>    
> 
> Note that although the variable is called nameval it
> does not store an
> attribute value, but the attribute node so
>     <xsl:copy>
>                <xsl:copy-of select="$nameval"/>
>     </xsl:copy>
> 
> generates an empty element )with name the same as
> the element in
> $leverreference) with a name attribute.
> 
> So
> 
> <xsl:for-each
> select="exslt:node-set($professionLevel)/*">
> 		<xsl:value-of select="."/>
> 	</xsl:for-each> 
> 
> will select a set of empty elements, <xsl:value-of
> select="."/> on each
> of them will be the empty string.
> 
> You need to use <xsl:value-of select="@name"/> here
> in order to get any
> output, but that will just concatemate all the
> values, so probably you
> will need to add spaces or commas in between.
> 
> David
> 
>
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