Hi, looking up the different terms with a common stem can be useful in different scenarios - so I don't want to judge it whether someone needs it or not.
E.g., in the case you have multilingual documents in your index, it is straight forward to determine the language of the documents in order to choose the right stemmer. At least this is right for document with homogenous language. Althought this is true at indexing time, the language classification for the user query is not such trivial - and you have to do this in order to stem the query terms for searching. One possibility would be to search for the stems given from all stemmers - but in this case you will receive many wrong searching terms, thus much noise in the result lists. Another possibility can be to offer all 'potential synonyms' of the query terms to the user - where he can choose whether these are right or not. In this case you need exactly the lookup 'queryTerm->stem->terms with same stem'. This can be much more precise, the lacks are of course the interaction needed by the user and longer queries. To realize this, someone could write a specific Analyzer that stores this relationship additionally e.g. into a database. I personaly don't know any possibility to read this directly out of the Lucene index. In the case someone has best practices or an idea how processing multilingual indices can be done better, I would be appreciated to read / hear about this. all best Chris On Tue, 6 Oct 2009 16:31:36 +0900 David Leangen <apa...@leangen.net> wrote: > > Hello, > > I've been using Lucene in a very basic way for some time now, and I'm > starting to take advantage of some of the linguistic capabilities only > now. > > I am making use of the snowball analyzer for stemming, and it works > very well. > > > Question: is there any such thing as a "reverse stemmer"? In other > words, given the stem of a word, is there any algorithm to find the > original word? Or is this just fantasy? ;-) > > Now, I understand that there is a 1:n mapping of stems:words. I can > deal with that. > > > Thanks! > =David > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org >
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