[xsl] Xpath - Selecting node that matches a min() condition within two attributes

[<michella@xxxxxxx>]

Hello,

I'm trying to select the right node from a nodeset that might match the
following condition :

Select node, such as (@X1 - @Size) is the smallest.

Here a sample XML :

<Nodeset>
	<Node number="1" X1="600" size="300"/>
	<Node number="2" X1="500" size="300"/>
	<Node number="3" X1="400" size="220"/>
	<Node number="4" X1="300" size="299"/>
	<Node number="5" X1="200" size="20"/>
</Nodeset>

Here, it should select node @number = 4

Here the XSL code I used, but seems not to be correct :

<xsl:variable name="minX_ID" select="Nodeset/Node[min(@X1 -
@Size)]/@number"/>

Thanks for your help

Lawrence