(//rec_gear_sec/*)[$gearMid] is returning the very first child, even
though $gearMid returns 34. I wasn't even sure if that syntax would be
allowed in 1.0.
This is a FAQ.
The expression is equivalent to //rec_gear_sec/* and selects _all_ such
elements not just the first (as you would see if you used xsl:copy-of
xsl:value-of always discards all but the first node.
The predicate [$gearMid] is the same as [true()] so doesn't filter
anything as a result tree fragment acts teh same way in a predicate as
a node set, that is a node set counts as true if it is non-empty and
false if it is empty. Result tree fragments always correspnd to node
sets with exactly one node (a root node) so always count as true in a
boolean context.
<xsl:variable name="gearMid">
<xsl:value-of select="round(count(//rec_gear_sec/*) div 2)"/>
</xsl:variable>
is a result tree fragment with a root node and a text node with string
vakue the decimal represntation of the number. You don't want that, you
want the number, which is
<xsl:variable name="gearMid">
select="round(count(//rec_gear_sec/*) div 2)"/>
If $gearMid is a number defined like this [] will be a numeric predicate
rather than a boolean one.
David
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