Michael Kay wrote: >I was thinking of a different case, $a/b() where the function b() returns >three elements. In that case, b() must be evaluated three times, and returns >three different elements each time. With a variable reference, however, the >variable must be evaluated exactly once, and the same value is used each >time. So the result is (<b1/>, <b2/>, <b3/>) or some permutation thereof >(since these elements are not in the same tree, their relative document >order is unpredictable). > Thanks Michael, Bas, Henry, and others who contributed. I think my original question really come down to what the semantics for variable binding are; having this clear means that everything else behaves as expected. Later CharlieReceived on Tuesday, 26 April 2005 22:31:05 UTC
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