Looks good, thanks Tom. -Jay
On Fri, Apr 15, 2011 at 8:55 AM, Burton-West, Tom <tburt...@umich.edu>wrote: > Thanks everyone. > > I updated the wiki. If you have a chance please take a look and check to > make sure I got it right on the wiki. > > http://wiki.apache.org/solr/DisMaxQParserPlugin#tie_.28Tie_breaker.29 > > Tom > > > > -----Original Message----- > From: Chris Hostetter [mailto:hossman_luc...@fucit.org] > Sent: Thursday, April 14, 2011 5:41 PM > To: solr-user@lucene.apache.org; yo...@lucidimagination.com > Cc: Burton-West, Tom > Subject: Re: Understanding the DisMax tie parameter > > > : Perhaps the parameter could have had a better name. It's essentially > : max(score of matching clauses) + tie * (score of matching clauses that > : are not the max) > : > : So it can be used and thought of as a tiebreak only in the sense that > : if two docs match a clause (with essentially the same score), then a > : small tie value will act as a tiebreaker *if* one of those docs also > : matches some other fields. > > correct. w/o a tiebreaker value, a dismax query will only look at the > maximum scoring clause for each doc -- the "tie" param is named for it's > ability to help break ties when multiple documents have the same score > from the max scoring clause -- by adding in a small portion of the scores > (based on the 0->1 ratio of the "tie" param) from the other clauses. > > > -Hoss >
