Hello,

Sort is used to sort a set of data. However how can I use sort to pick up the biggest value?
Here is my xml data. I want to sort "antiCollisionData" by "separationFactor" and pick up the largest "interBoundary" of the three.

            <antiCollisionSet>
                <antiCollisionData>
                    <interBoundary>
                        <metres>2.09067</metres>
                    </interBoundary>
                    <seperationFactor>2090.67</seperationFactor>
                </antiCollisionData>
                <antiCollisionData>
                    <interBoundary>
                        <metres>2.97572</metres>
                    </interBoundary>
                    <seperationFactor>2975.72</seperationFactor>
                </antiCollisionData>
                <antiCollisionData>
                    <interBoundary>
                        <metres>2.06649</metres>
                    </interBoundary>
                    <seperationFactor>2066.49</seperationFactor>
                </antiCollisionData>
            </antiCollisionSet>


Can you help me with this?

here is my xsl (but it doesnt work):

<xsl:for-each select="antiCollisionSet">
   <xsl:sort select="antiCollisionData/seperationFactor"/>
     <xsl:value-of select="antiCollisionData/interBoundary/metres"/>
</xsl:for-each>

thanx

xsl:for-each select="antiCollisionSet" is only going to select one element, and sorting a set containing one element isn't going to do much good.

You want

xsl:for-each select="antiCollisionSet/antiCollisionData"
  xsl:sort select select="separationFactor" (or however you choose to misspell it)

I'm confused about the relationship of separationFactor to interboundary/metres - are they always directly related?

To choose the largest value, do

<xsl:if test="position()=last()">
  <xsl:value-of select="."/>
</xsl:if>

inside the for-each, after the xsl:sort.



Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Thanx Michael,

That was very helpful (even the spelling tip ).

separation factor is related to the interboundary. I just removed some data from the xml example that i gave just to make it a simpler example.

Thanx again,