I also have to use XML 1.0.
I assume you mean xslt 1.
I know that variables and parameters in XSLT don't work the same as a
coder is used to
That depends of course what the previous experience of the coder is.
variables in declarative languages denote values rather than memory
locations, so they act in a natural way so long as you use variable with
its normal meaning rather than the somewat strained use of the term in
imperative programming languages where strange things like x=x+1 make
sense.
You want the sum of all the colspan attributes that have a numeric
attribute plus the number of th elements without such an attribute
select="
sum(th/@colspan[number(.)=number(.)])
+
count(th[not(@colspan) or not(@colspan[number(.)=number(.)])])
"
David
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