[xquery-talk] suppressing emission of elements if no value
Francis Upton
francisu at ieee.org
Thu Jun 10 11:33:07 PDT 2004
I have an application where I am generating XQuery and have a requirement
that if there is no value for an expression, it should not generate an element.
So I would like something like:
element x { a/b }
to emit nothing, assuming a/b is empty.
This expression emits <x></x> when a/b is empty.
The only way I can think of to do this is to wrap a condition around it like:
if (a/b) then element x { a/b } else ()
Is there any other way to approach this? I don't like wrapping an if
statement around it because the "a/b" can be quite complex and time
consuming to compute and there could be quite a number of these in the
types of documents I'm working with. I realize this may be something that
some XQuery engines might optimize; if that's the case it's probably fine.
Thanks for your help.
Francis
Francis Upton IV
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