Got an interesting question about Lucene's behavior, as recently I was handed something that look like this: ( +MEDICAL CAT^2 ) OR ( +ANIMAL CAT^-2 )
The intention of the query is to say "if medical is found, then rank cat [scans] high, but if animal is found then rank cat [a feline] low." Problem is my understanding of Lucene tells me that there really is no AND / OR set operations, and that instead Lucene has a REQUIRED, NOT_REQUIRED, SHOULD setting for each term. As such, one might be able to "simulate" certain kinds of AND/OR expressions, but that subexpression statements are independently isn't happening. Is my understanding correct, or will Lucene do this kind of magic? The actual query I was given to construct programatically was significantly more complex. -wls
