On Monday 30 May 2005 18:54, Andrew Boyd wrote: > Now that the QueryParser knows about position increments has anyone > used this to do stemming at query time and not at indexing time? I > suppose one would need a reverse stemmer. Given the query breath it > would need to inject breathe, breathes, breathing etc.
There are two things to consider: queries will get more complicated and thus slower and the implementation isn't that easy: while stemming can be done with a simple algorithm (for English), you'll need a dictionary with at least part-of-speech information for adding suffixes. That's because you cannot just add "ing" to any word, otherwise you'd end up with car + ing = caring. (But once you have this dictionary the quality of your solution can be better than that of a stemmer, as stemmers also suffer form over-stemming, i.e. mapping two non-related words to the same form). Regards Daniel -- http://www.danielnaber.de --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
