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From: Nitin Shiralkar <nitins@coreobjects.com>
To: "lucene-net-user@incubator.apache.org"
	<lucene-net-user@incubator.apache.org>
Date: Thu, 6 May 2010 23:00:56 +0530
Subject: Lucene search relevancy: Optimization
Thread-Topic: Lucene search relevancy: Optimization
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Hi,

We are using Lucene in a knowledge management system for legal domain. We i=
ndex lot of legal documents into Lucene as free-text and also index some me=
tadata information (extracted from document) into separate fields. Now we w=
ant to optimize relevancy for following cases:


1.       Searching with free-text query:
We want to provide a google-like simple search interface accepting a free-t=
ext query. However in order to achieve better relevancy, we want to map tha=
t query against metadata fields. For example, if the user searches for "Cal=
ifornia Merger Agreement for telecom" document then we want to internally s=
earch for "California" against State metadata field, "Merger agreement" aga=
inst document type field and also complete text as full-text index. What wo=
uld be the best way to do that?


2.       Returning high-rated documents on top:

We have some high-rated documents in the system and we do store this high-v=
alue field in index. For any type of searches, we want high-value documents=
 to appear on top if they satisfy search criteria. One of the ways that we =
are thinking is to sort on high-value field to get those on top. Is there a=
ny other way like boosting etc?


I know these are pretty specific application questions, but any guidance wo=
uld be appreciated.

Thanks in advance !

Nitin

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