Ah - the one bit of LIA I haven't read yet is the case studies section! Many thanks, I'll check it out. Sorting by multiple fields isn't quite what I want - that sorts entirely by field A, then uses field B for records where A is identical, correct?
What I really want to do is sort by "A * (1-(B/700))", where A is the score, and B is the age (in days) of the document. IE - the score is basically "scaled down" with date. Cheers, Tim. -----Original Message----- From: Erik Hatcher [mailto:[EMAIL PROTECTED] Sent: 16 September 2005 14:54 To: java-user@lucene.apache.org Subject: Re: Sorting results by both score and date Tim, check out p. 155 in LIA where we discuss "Sorting by multiple fields". However, what you're really after it seems is boosting documents. Check out TheServerSide's case study (online or in LIA) - Dion discusses how he implemented boosting for more recent documents. If you're indexing documents in ascending date order, perhaps you could leverage the document id in such a boosting factor? Erik ******************************************************************************** The information contained in this email message may be confidential. If you are not the intended recipient, any use, interference with, disclosure or copying of this material is unauthorised and prohibited. Although this message and any attachments are believed to be free of viruses, no responsibility is accepted by T&F Informa for any loss or damage arising in any way from receipt or use thereof. Messages to and from the company are monitored for operational reasons and in accordance with lawful business practices. If you have received this message in error, please notify us by return and delete the message and any attachments. Further enquiries/returns can be sent to [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
