Have you looked at the "pf" (phrase fields) parameter of edismax?
http://wiki.apache.org/solr/DisMaxQParserPlugin#pf_.28Phrase_Fields.29 Best Erick On Sat, Dec 3, 2011 at 7:04 PM, <alx...@aim.com> wrote: > Hello, > > Here is my request handler > > <requestHandler name="search" class="solr.SearchHandler" > > <lst name="defaults"> > <str name="defType">edismax</str> > <str name="echoParams">explicit</str> > <float name="tie">0.01</float> > <str name="qf">site^1.5 content^0.5 title^1.2</str> > <str name="pf">site^1.5 content^0.5 title^1.2</str> > <str name="fl">id,title, site</str> > <str name="mm">2<-1 5<-2 6<90%</str> > <int name="ps">300</int> > <bool name="hl">true</bool> > <str name="q.alt">*:*</str> > <str name="hl.fl">content</str> > <str name="f.title.hl.fragsize">0</str> > <str name="hl.fragsize">165</str> > <str name="f.title.hl.alternateField">title</str> > <str name="f.url.hl.fragsize">0</str> > <str name="f.url.hl.alternateField">url</str> > <str name="f.content.hl.fragmenter">regex</str> > </lst> > </requestHandler> > > I have made a few tests with debugQuery and realised that for two word > phrases, solr takes the first word and gives it a score according to qf param > then takes the second word and gives it score and etc, but not to the whole > phrase. That is why if one of the words is in the title and one of them in > the content then this doc is given higher score than the one that has both > words in the content but none in the title. > > Ideally, I want to achieve the following order. > 1. If one (or both) of the words are in field site, then it must be given > higher score. > 2. Then come docs with both words in the title. > 3. Next, docs with both words in the content. > 4. And finally docs having either of words in the title and content. > > I tried to change mm param to <str name="mm">1<-1 5<-2 6<90%</str> > This allows to achieve 1,4 but not 2,3 > > Thanks. > Alex. > > > > > > > > > > > > > -----Original Message----- > From: Chris Hostetter <hossman_luc...@fucit.org> > To: solr-user <solr-user@lucene.apache.org> > Sent: Thu, Nov 17, 2011 2:17 pm > Subject: Re: two word phrase search using dismax > > > > > : After putting the same score for title and content in qf filed, docs > > : with both words in content moved to fifth place. The doc in the first, > > : third and fourth places still have only one of the words in content and > > : title. The doc in the second place has one of the words in title and > > : both words in the content but in different places not together. > > > > details matter -- if you send futher followup mails the full details of > > your dismax options and the score explanations for debugQuery are > > neccessary to be sure people understand what you are describing (a > > snapshot of reality is far more valuable then a vague description of > > reality) > > > > off hand what you are describing sounds correct -- this is what the > > dismax parser is really designed to do. > > > > even if you have given both title and content equal boosts, your title > > field is probably shorter then your content field, so words matching once > > in title are likly to score higher then the same word matching once in > > content due to length normalization -- and unless you set the "tie" param > > to something really high, the score contribution from the highest scoring > > field (in this case title) will be the dominant factor in the score (it's > > disjunction *max* by default ... if you make tie=1 then it's disjunction > > *sum*) > > > > you haven't mentioned anything about hte "pf" param at all which i can > > only assume means you aren't using it -- the pf param is how you configure > > that scores should be increased if/when all of the words in teh query > > string appear together. I would suggest putting all of the fields in your > > "qf" param in your "pf" param as well. > > > > > > -Hoss > > >
