It seems as if Saxon handles the empty sequence as a special case. The following query..
trace( (1,2), "Trace: ") ..will create similar output in BaseX, Saxon, Zorba and other processors while Saxon is the only one (I tried) to return output for an empty sequence, such as... trace( (), "Trace: ") The specification does not enforce a certain behavior on how to handle sequences [1], which is why different solution have been chosen. Hope this helps, Christian [1] http://www.w3.org/TR/xpath-functions-30/#func-trace _______________________________ > My query is of the form: > > if (not(empty($variable))) then > ... return some XML... > else > fn:trace((), "Warning : Variable is empty") > > After your reply I tried the following to see if I remove the optimization, > but not luck - still no output on stderr: > > if (not(empty($variable))) then > ... return some XML... > else > $result := fn:trace((), "Warning : Variable is empty") > return $result _______________________________________________ BaseX-Talk mailing list BaseX-Talk@mailman.uni-konstanz.de https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk
