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Date: Thu, 25 Oct 2012 09:23:30 +0530
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Subject: Re: Scoring based on document
From: selvakumar netaji <vvekselva.gm@gmail.com>
To: java-user@lucene.apache.org
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Hi Siraj,

Even in the approach presented earlier we can have search capabilities for
the individual field by making the document with the individual fields and
the copy fields.

Let me know if I'm wrong.


On Thu, Oct 25, 2012 at 1:18 AM, Siraj Haider <siraj@jobdiva.com> wrote:

> Any other suggestions?
>
> regards
> -Siraj
> (212) 306-0154
>
> -----Original Message-----
> From: Siraj Haider [mailto:siraj@jobdiva.com]
> Sent: Tuesday, October 23, 2012 6:06 PM
> To: java-user@lucene.apache.org
> Cc: simon.willnauer@gmail.com
> Subject: RE: Scoring based on document
>
> Thanks for the suggestion, but in that scenario, I would lose the ability
> to search on individual fields, i.e. I would not be able to search on title
> field only, and would end up with results where the searched term might be
> in the description field.
>
> regards
> -Siraj
> (212) 306-0154
>
> -----Original Message-----
> From: selvakumar netaji [mailto:vvekselva.gm@gmail.com]
> Sent: Tuesday, October 23, 2012 1:58 PM
> To: java-user@lucene.apache.org
> Cc: simon.willnauer@gmail.com
> Subject: Re: Scoring based on document
>
> Hi All,
>
> Just wanted to make sure that will approach would fails for this case.
>
> Having a copy field for each of the document, having the concatenated
> values  of all the fields in that document and searching on the copy field
> would just produce the result. The resulting docs would  be based on the
> frequency of the query terms in the whole document.
>
> On Tue, Oct 23, 2012 at 7:48 PM, Siraj Haider <siraj@jobdiva.com> wrote:
>
> > So, just to confirm, using Lucene 4.0, we would be able to issue a
> > search on one or more fields and would be able to get the results
> > sorted by a custom field and also would be able to get the score of
> > each document based on the frequency of the terms searched in all the
> > indexed fields of that document (rather than getting it scored just by
> > the fields in the query, which is the case now).
> >
> > If this is true, could be please guide me into the direction on how to
> > implement it?
> >
> > Thanks a lot for your help.
> >
> > -Siraj
> > (212) 306-0154
> >
> > -----Original Message-----
> > From: Simon Willnauer [mailto:simon.willnauer@gmail.com]
> > Sent: Tuesday, October 23, 2012 3:51 AM
> > To: java-user@lucene.apache.org
> > Subject: Re: Scoring based on document
> >
> > hey there,
> >
> >
> > in Lucene 4 you can override the termStatistics / CollectionStatistics
> > used for scoring in the IndexSearcher. You can take multiple fields
> > into account here in order use it for scoring. Here is the javadoc
> > link:
> >
> >
> > http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/search/Inde
> > xSearcher.html#termStatistics(org.apache.lucene.index.Term
> > ,
> > org.apache.lucene.index.TermContext)
> >
> > http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/search/Inde
> > xSearcher.html#collectionStatistics(java.lang.String)
> >
> >
> > simon
> > On Mon, Oct 22, 2012 at 11:25 PM, Siraj Haider <siraj@jobdiva.com>
> wrote:
> > > I am using DefaultSimilarity and did not boost any field while
> indexing.
> > My index is comprised of the following fields:
> > >
> > > -          Title
> > >
> > > -          Author
> > >
> > > -          Bookname
> > >
> > > -          Description
> > >
> > > All of the 4 fields are indexed and can be searched on by the user.
> > > Now
> > let's say the user searches for "oracle" in Title field, the score is
> > computed based on the Title field only, and its disregarding the
> > frequency of the term "oracle" in other fields. It might be like that
> > by design but I need to change it so that the documents are ranked
> > based on the frequency in the whole document and not based on the field
> searches. Please help!
> > >
> > > Thanks in advance
> > > -Siraj
> > >
> > >
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