: >Is it possible to enable stem queries on a per-query basis? It doesn't : >seem to be possible since the stem tokenizing is done during the : >indexing process. Are people basically stuck with having all their : >queries stemmed or none at all?
: From what I've read, if you want to have a choice, the easiest way is : to index the documents twice. Once with stemming on and once with it off : placing the results in two different indexes. Then at query time, : select which index you want to use based on whether you want stemming on : or off. As I understand it, the intented place to impliment Stemming is in an Analyzer Filter (not to be confused with a search Filter). Since you can can specify an Analyzer when you call addDocument, you don't have to acctually have two seperate indexes, you could just have all the docs in one index - and use a search Filter to indicate which docs to look at. Alternately: the Analyzer's tokenStream method is given the fieldName being analyzed, so you could write an Analyzer with a set of rules telling it to only apply your Stemming filter to certain fields, and then instead of having twice as many documents, you can just index your text in two seperate fields (which should be a little easier, then seperate docs because you are only duplicating the fields where stemming is relevant) Then at search time you don't have to filter anything, just search the field that's applicable to your current desire (stemmed or unstemmed) Lastely: Allthough it's tricky to get correct, there's no law saying you have to use the same Analyzer when you query as when you index. You could index your documents using an Analyzer that does no stemming, and then at search time (if you want stemming) use an Analyzer that does "reverse stemming" to expand your query terms out to all the possible variants. (NOTE: I've never acctaully tried this, but i think the theory is sound). -Hoss --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
