: thanks for your explanations. But why are all docs being *removed* from the
: set of all docs that contain R in their topic field? This would correspond to
: a boolean AND and would stand in conflict with the clause q.op=OR. This seems
: a bit strange to me.
Erick's explanation might have been a tad missleading ... it's not an
ordered operation, AND, OR, and NOT are just syntactic-sugar for modifying
the MUST, MUST_NOT, and SHOULD. The default op of "OR" only affects the
first clause of your query (R) because it doesn't have any modifiers --
the second clause has that NOT modifier so your query is effectivley...
topic:R -topic:[* TO *]
...which by definition can't match anything.
-Hoss
