hi miles, thanks for the response. I think I didn't explain my Problem good enough.
The harder problem for me is how to get the proposals for the refinement? I have a date-range of 16xx to now, for about 4 bn. docs. So the number of found documents could be quite large. But the distribution of the dates could be very different form one query to another. I hope there is a better way than to collect all dates with HitIterator, and do statistics on the data? Is there something that could be done while indexing? What would be a high-performance heuristic? The same problem with other categories like the author: how to find good proposals for a given result set? >> I want to have something like: >> >> Refine by Date: >> * 1990-2000 (30 Docs) >> * 2001-2003 (200 Docs) >> * 2004-2006 (10 Docs) >> >> But not only DateRanges but also for other Categories. >> >> Does anybody knows where to find some Source Code, to get an Idea how to >> implement this? >> I think that's a useful property for a search engine, so are there any >> contributions for Lucene for that? >> > > If you want to do a refined search I'd put the original query in a > QueryFilter, which filters on the new search. > > http://lucene.apache.org/java/docs/api/org/apache/lucene/search/QueryFilter.html > Alternatively, since you appear to only want to refine on dates and > categories, you might want to put them in filters so they don't affect > the score, and leave the query as is. In which case you can use a > RangeQuery for the dates, and a wrap a TermQuery in a QueryFilter to > handle the categories. > > If you need multiple filters you can use the ChainedFilter class. > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
