On 8/30/07, David Carlisle <davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
exists(para[2]) and not(exists(para[3]))
or
th count() could be noticably slower
if the sy> >
exists(para[2]) and empty(para[3])
they both always look for the 2nd and 3rd element but you don't need t0
look for the 3rd if the 2nd isn't there....
if (para[2]) then empty(para[3]) else false()
but the chance that any of these make a measurable difference is slim,
You never know being too clever with the XPath may just confuse the
optimizer and end up making things slower...
I think there might be a rule here of "code the obvious"
--
http://andrewjwelch.com
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