Ultraseek has "recent and relevant" as an option. We used the document age in days (now - document_date) and took the log of that. You need to adjust the boost to have the desired amount of influence.
The most conservative approach is to use it as a tiebreaker, so that you can distinguish between two different "President Bush" stories that are about different presidents. wunder On 3/8/08 8:29 PM, "James Brady" <[EMAIL PROTECTED]> wrote: > Sorry, I really should have directly explained what I was looking to > do: theserverside.com give higher scores to documents that were added > more recently. > > I'd like to do the same, without the date boost being too overbearing > (or unnoticeable...) - some ideas on how to approach this would be > great. > > James > > Begin forwarded message: > >> From: James Brady <[EMAIL PROTECTED]> >> Date: 8 March 2008 19:41:56 PST >> To: solr-user@lucene.apache.org >> Subject: Favouring recent matches >> >> Hello all, >> In Lucene in Action, (replicated here: >> http://www.theserverside.com/tt/articles/article.tss?l=ILoveLucene) >> , theserverside.com team say "The date boost has been really >> important for us". >> >> I'm looking for some advice on the best way to actually implement >> this - the only way I can see to do it right now is to set a boost >> for documents at index time that increases linearly over time. >> However, I'm wary of skewing Lucene's scoring in some strange way, >> or interfering with the document boosts I'm setting for other reasons. >> >> Any suggests? >> >> Thanks >> James >
