thanks, I understand how boosting works, what I need will be a boost in the query that will increase the score of a page if all keywords/query is found in the page to increase its ranking.
I tried all sort of combination and it did not work. Anyone can provide any suggestion? Simon Willnauer wrote: > > Hi there, > > well, where to start from.... I would suggest you look at the output > of Query#explain() first to see how the score is calculated. You might > use a simpler query to get started with it as this might be quite > cryptic if you see it the first time. > To completely understand what the output means have a closer look to > the javadoc of the class Similarity > (http://lucene.apache.org/java/2_4_1/api/core/org/apache/lucene/search/Similarity.html) > this will explain how the score is calculated in the very detail. > Once you understand what is going on during the scoring process I > would suggest you revise your boosting. I don't know if you have field > boost set but it seems it would make more sense in your usecase as far > as I can tell. > In general make sure you understand what the different boosts are used > for - this snippet from the wiki might help you: > <snip> > What is the difference between field (or document) boosting and query > boosting? > > Index time field boosts (field.setBoost(boost)) are a way to express > things like "this document's title is worth twice as much as the title > of most documents". Query time boosts (query.setBoost(boost)) are a > way to express "I care about matches on this clause of my query twice > as much as I do about matches on other clauses of my query". > > Index time field boosts are worthless if you set them on every document. > > Index time document boosts (doc.setBoost(float)) are equivalent to > setting a field boost on ever field in that document. > </snip> > (http://wiki.apache.org/lucene-java/LuceneFAQ#head-246300129b9d3bf73f597facec54ac2ee54e15d7) > > hope that helps to get started with scoring etc. > > simon > > > On Tue, Aug 11, 2009 at 10:50 AM, bourne71<gary...@live.com> wrote: >> >> Hi, >> >> I am fairly new to Lucene and have encounter a problem with the search >> function i am trying to create using Lucene. When I search, lets say >> "news >> sharing", then the results return and display. >> >> Its fine up to this point until I check the ranking. Some results, >> although >> match only 1 of the 2 keywords, will have higher ranking. The problem is >> like describe below: >> >> Page 1 >> news - Total found 23 >> sharing - Total found 0 >> >> Page 2 >> news - Total found 1 >> sharing - Total found 21 >> >> This is understandable why Page 1 got better ranking, bcs it has more >> keyword found. But this will make the results return to be less relevant >> >> My current query is like the following: >> (url:sharing^2.0 content:sharing title:sharing^1.5) (url:news^2.0 >> content:news title:news^1.5) url:"sharing news"~2147483647^2.0 >> content:"sharing news"~2147483647 title:"sharing news"~2147483647^1.5 >> >> Is there anyway I can add an additional query that will give an >> additional >> boost to results that has both the keyword in it? >> -- >> View this message in context: >> http://www.nabble.com/Query-Boosting-tp24913967p24913967.html >> Sent from the Lucene - Java Users mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > -- View this message in context: http://www.nabble.com/Query-Boosting-tp24913967p24928789.html Sent from the Lucene - Java Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
