Question

This question follows on from query XSLT: Sorting based on sum of values from other nodes

I have this piece of xslt (thanks to Demitre) which I’ve modified to receive a parameter ‘Gait’ which can have values ‘P’ (Pace), ‘T’ (Trot) or ‘A’ (All):

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:key name="kOffspring" match="Horse" use="SireID"/>
 <xsl:param name="Gait"/>

 <xsl:template match="/*">
  <xsl:apply-templates select="Sires/Sire">
   <xsl:sort select="sum(key('kOffspring', ID)/*/Stakes)"
             data-type="number" order="descending"/>
  </xsl:apply-templates>
 </xsl:template>

 <xsl:template match="Sire">
     Sire <xsl:value-of select="concat(ID,' (', Name, ') Stakes: ')"/>
   <xsl:value-of select="sum(key('kOffspring', ID)/*/Stakes)"/>
 </xsl:template>
 <xsl:template match="text()"/>
</xsl:stylesheet>

In the above code is this piece

sum(key('kOffspring', ID)/*/Stakes

Is there a way to substitute the asterisk part with the name of a node in xml tree depending on what value was passed in for gait?

Super simplified xml is:

<t>
    <Horses>
        <Horse>
            <ID>5</ID>
            <Name>hrsE</Name>
            <SireID>101</SireID>
            <Pace>
                <Stakes>100</Stakes>
            </Pace>
            <Trot>
                <Stakes>300</Stakes>
            </Trot>
        </Horse>
    </Horses>
    <Sires>
        <Sire>
            <ID>101</ID>
            <Name>srA</Name>
            <LiveFoalsALL>117</LiveFoalsALL>
        </Sire>
    </Sires>
</t>

When $Gait is ‘A’ I want sum(key(‘kOffspring’, ID)/*/Stakes (look in all sub-nodes of Horse)

When $Gait is ‘P’ I want sum(key(‘kOffspring’, ID)/Pace/Stakes (look in the Pace node only to find Stakes)

When $Gait is ‘T’ I want sum(key(‘kOffspring’, ID)/Trot/Stakes (look in the Trot node only to find Stakes)

So this is super-simplified example. I’m trying to stop having to duplicate hundred lines of code to cater to different values of $Gait. I played around trying use variables but couldn’t see how to change the value of the node path when it is using a key in the path. I saw I could potentially use a choose statement in the ‘match=”/*”‘ template but that was only for sorting, I was still stuck when I got to the ‘Sire’ template – didn’t want to have to put ‘choose’ around all the multitude of ‘value-of select’ statements I have.

Thanks for any suggestions.
Regards,
Bryce Stenberg.

Answer 1

Just use

sum(key('kOffspring', ID)/*[name()=$Gait]/Stakes