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Posted to java-user@lucene.apache.org by Marc Sturlese <ma...@gmail.com> on 2010/03/16 19:58:04 UTC
score and multiValued fields
I would like to know how Lucene deals with the score on multiValued fields.
I am wandering if:
1) a score is computed per field and the maximum between them wins
or
2)all terms of all fields (from the multivalued field) influence eachother
to compute the score
Let's say I have a document with a multiValued field "content" indexed 3
times and another document with the field indexed just once
Doc1: content->aa; content->bb; content->dd ff gg
Doc2: content->aa b
Searching for content:aa, Doc1 would be more relevant if supososition 1) is
correct. Doc2 would be more relevant if suposition 2) is correct
How does it work?
Thanks in advance
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Re: score and multiValued fields
Posted by Marc Sturlese <ma...@gmail.com>.
Confirmed, supposition 2 is the right one.
Erick Erickson wrote:
>
> Have you looked at:
> http://lucene.apache.org/java/2_4_0/scoring.html
>
> <http://lucene.apache.org/java/2_4_0/scoring.html>even though it's for
> 2.4,
> I don't think there's any relevant changes for 3.x...
>
> I'm pretty sure that your supposition 2 is the right one.
>
> HTH
> Erick
>
> On Tue, Mar 16, 2010 at 2:58 PM, Marc Sturlese
> <ma...@gmail.com>wrote:
>
>>
>> I would like to know how Lucene deals with the score on multiValued
>> fields.
>> I am wandering if:
>> 1) a score is computed per field and the maximum between them wins
>> or
>> 2)all terms of all fields (from the multivalued field) influence
>> eachother
>> to compute the score
>>
>> Let's say I have a document with a multiValued field "content" indexed 3
>> times and another document with the field indexed just once
>>
>> Doc1: content->aa; content->bb; content->dd ff gg
>> Doc2: content->aa b
>>
>> Searching for content:aa, Doc1 would be more relevant if supososition 1)
>> is
>> correct. Doc2 would be more relevant if suposition 2) is correct
>> How does it work?
>> Thanks in advance
>>
>>
>>
>> --
>> View this message in context:
>> http://old.nabble.com/score-and-multiValued-fields-tp27922940p27922940.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
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>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>>
>
>
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Re: score and multiValued fields
Posted by Erick Erickson <er...@gmail.com>.
Have you looked at:
http://lucene.apache.org/java/2_4_0/scoring.html
<http://lucene.apache.org/java/2_4_0/scoring.html>even though it's for 2.4,
I don't think there's any relevant changes for 3.x...
I'm pretty sure that your supposition 2 is the right one.
HTH
Erick
On Tue, Mar 16, 2010 at 2:58 PM, Marc Sturlese <ma...@gmail.com>wrote:
>
> I would like to know how Lucene deals with the score on multiValued fields.
> I am wandering if:
> 1) a score is computed per field and the maximum between them wins
> or
> 2)all terms of all fields (from the multivalued field) influence eachother
> to compute the score
>
> Let's say I have a document with a multiValued field "content" indexed 3
> times and another document with the field indexed just once
>
> Doc1: content->aa; content->bb; content->dd ff gg
> Doc2: content->aa b
>
> Searching for content:aa, Doc1 would be more relevant if supososition 1) is
> correct. Doc2 would be more relevant if suposition 2) is correct
> How does it work?
> Thanks in advance
>
>
>
> --
> View this message in context:
> http://old.nabble.com/score-and-multiValued-fields-tp27922940p27922940.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>