lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Avi Rosenschein <>
Subject Re: Relevancy Practices
Date Sun, 02 May 2010 12:50:07 GMT
On 4/30/10, Grant Ingersoll <> wrote:
> On Apr 30, 2010, at 8:00 AM, Avi Rosenschein wrote:
>> Also, tuning the algorithms to the users can be very important. For
>> instance, we have found that in a basic search functionality, the default
>> query parser operator OR works very well. But on a page for advanced
>> users,
>> who want to very precisely tune their search results, a default of AND
>> works
>> better.
> Avi,
> Great example.  Can you elaborate on how you arrived at this conclusion?
> What things did you do to determine it was a problem?
> -Grant

Hi Grant,

Sure. On, we use search in a variety of
places and ways.

In the basic search box (what you get if you look stuff up in the main
Ask box on the home page), we generally want the relevancy matching to
be pretty fuzzy. For example, if the user looked up "Where can you see
photos of the Aurora Borealis effect?" I would still want to show them
"Where can you see photos of the Aurora Borealis?" as a match.

However, the advanced search page,, is used by advanced users to
filter questions by various facets and searches, and to them it is
important for the filter to filter out non-matches, since they use it
as a working page. For example, if they want to do a search for "Harry
Potter" and classify all results into the "Harry Potter" category, it
is important that not every match for "Harry" is returned.

-- Avi

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message