Re: [xsl] Concatenate and unique values

[Geert Josten <Geert.Josten@xxxxxxxxxxx>]

Should related to the grouping problem that is discussed on various places. Look for instance at 
http://www.jenitennison.com/xslt/index.html

Basically you need a key that holds all combinations and then use generate-id to pick the first of 
each unique combination.

(top level)
<xsl:key name="diseases" match="Disease" use="concat(SymptomNum, '-', Pulse, '-', HeartBeat)" />

<xsl:template match="Disease">
  <xsl:if test="generate-id(.) = generate-id(key('diseases', concat(SymptomNum, '-', Pulse, '-', 
HeartBeat)[1])">
    <!-- show the disease, this is the first of the unique combination -->
  </xsl:if>
</xsl:template>

Or replace the xsl:template by the for-each if you prefer that...

Grtz,
Geert

pnayak@xxxxxxx wrote:

> 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

--
Geert.Josten@xxxxxxxxxxx
IT-consultant at Daidalos BV, Zoetermeer (NL)

http://www.daidalos.nl/
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