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 $leverreference RTF and display only unique
names with number of occurrence. I would appreciate
for any suggestion on performance.
regards.
Ranjan
I have atleast used 3 RTF to get the result.
--- David Carlisle <davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
I have a RTF with following declaration
<xsl:variable name="professionLevel">
<xsl:for-each select="//profession">
<xsl:variable name="nameval"
select="@name"/>
<xsl:variable name="parentval"
select="@parent"/>
<xsl:for-each
select="exslt:node-set($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)/*[(_at_)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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