Concatenate and unique values

Hi All

SymptomNum is sequential from 0 till the number of rows of data. Each row has 
SymptomNum, Pulse and Heart-beat. Across all the SymptomNum, I want to find the 
unqiue combinations of Pulse and Heart-beat existing in the data. There may be 
repitions, so I want to ignore them.

<xsl:for-each select="//Health/Disease[(./SymptomNum)>=0]">

<xsl:variable name="current-sym-num" select="./SymptomNum"/>

<xsl:variable name="pulse-val" select="./Pulse"/>

<xsl:variable name="heart-beat-val" select="./HeartBeat"/>

<xsl:variable name="sym-summary" select="concat($pulse-val, ' ', 
$heart-beat-val)"/> 

<!-- Display all unique combinations of pulse-val and heart-beat-val -->

<xsl:if test="$pulse-val and $heart-beat-val">

    How do i find that this current combination of pulse-val and heart-beat-val 
is unique?

</xsl:if>

</xsl:for-each>

I have been using this logic to get unique values of pulse values:

<xsl:variable name="unique-pulse-num" 
select="//Health/Disease/Pulse[not(.=following::Pulse)]" />

<xsl:for-each select="$unique-pulse-num">

    <xsl:value-of select="." />, 

</xsl:for-each>

Can this logic be extended to multiple attributes of an element? Can anyone 
help me with this logic? Thanks in advance,

Pragyan




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