[Exist-open] More XQuery madness...

[Chris Marasti-G. <cg...@rj...>]

Autonomous test case:
=20
<node/> | ()
=20
(My) expected result:
=20
<node/>
=20
Actual result:
=20
Error XPTY0004 : union operand is not a node sequence

If I am not mistaken, () is the equivalent of a sequence of nodes,
length 0.
=20
I have a case where I need to collect a set of results like:
 $doc//node-a | $doc//node-b | $doc//node-c | $doc//node-d
=20
I do not know if any or all of those nodes exist, and it would be nice
not to have to check
=20
Chris Marasti-Georg