Return-Path: Delivered-To: apmail-lucene-java-user-archive@www.apache.org Received: (qmail 15028 invoked from network); 13 Dec 2006 15:42:50 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 13 Dec 2006 15:42:50 -0000 Received: (qmail 74332 invoked by uid 500); 13 Dec 2006 15:42:49 -0000 Delivered-To: apmail-lucene-java-user-archive@lucene.apache.org Received: (qmail 74286 invoked by uid 500); 13 Dec 2006 15:42:49 -0000 Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: java-user@lucene.apache.org Delivered-To: mailing list java-user@lucene.apache.org Received: (qmail 74275 invoked by uid 99); 13 Dec 2006 15:42:49 -0000 Received: from herse.apache.org (HELO herse.apache.org) (140.211.11.133) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 13 Dec 2006 07:42:49 -0800 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (herse.apache.org: domain of TheRanger@gmx.net designates 213.165.64.20 as permitted sender) Received: from [213.165.64.20] (HELO mail.gmx.net) (213.165.64.20) by apache.org (qpsmtpd/0.29) with SMTP; Wed, 13 Dec 2006 07:42:37 -0800 Received: (qmail 18391 invoked by uid 0); 13 Dec 2006 15:42:16 -0000 Received: from 130.159.248.222 by www070.gmx.net with HTTP; Wed, 13 Dec 2006 16:42:16 +0100 (CET) Content-Type: text/plain; charset="iso-8859-1" Date: Wed, 13 Dec 2006 16:42:16 +0100 From: "Karl Koch" In-Reply-To: Message-ID: <20061213154216.320030@gmx.net> MIME-Version: 1.0 References: <20061212103214.218000@gmx.net> <457EC431.5010305@syr.edu> <20061212164706.248900@gmx.net> <457F2A14.3080008@syr.edu> <20061213150028.121880@gmx.net> Subject: Re: Lucene scoring: coord_q_d factor To: java-user@lucene.apache.org X-Authenticated: #21808356 X-Flags: 0001 X-Mailer: WWW-Mail 6100 (Global Message Exchange) X-Priority: 3 Content-Transfer-Encoding: 8bit X-Virus-Checked: Checked by ClamAV on apache.org Do you know about any papers that discuss this? Karl -------- Original-Nachricht -------- Datum: Wed, 13 Dec 2006 10:31:41 -0500 Von: "Yonik Seeley" An: java-user@lucene.apache.org Betreff: Re: Lucene scoring: coord_q_d factor > On 12/13/06, Karl Koch wrote: > > To me, it seems that coordination level matching could be used if I > don't want to use TFxIDF but not together with it. In this context, I wonder > what benefit the "coordination level matching" has in combination with > TFxIDF? > > Well, if I search for blue kangaroo, the coord is nice to get > documents with "blue" and "kangaroo" to score higher than documents > with just one term. And among documents with just one term, the idf > factor will make "kangaroo" rank above "blue", which is generally > desired. > > I have seen complaints about the default similarity though, where the > coord factor does not give enough of a boost in relation to the idf of > some of the individual terms. > > > -Yonik > http://incubator.apache.org/solr Solr, the open-source Lucene search > server > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org > For additional commands, e-mail: java-user-help@lucene.apache.org -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal f�r Modem und ISDN: http://www.gmx.net/de/go/smartsurfer --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org For additional commands, e-mail: java-user-help@lucene.apache.org