Generate links to narrow down/ broaden the search..

Forgot to mention, I am using Nutch 0.7.2


On 6/26/06, Jayant krishna Gandhi <jayantggmail.com> wrote:
> Short Desc:- I need to develop the links to allow the
user to narrow
> down or broaden the search results. How can I achieve
it? I have
> thought of the possible algo for it which is given in
the end.
>
> Detailed Desc. with example:-
> Suppose I have 3 fields that are indexed and searchable
namely
> vehicletype, vehiclebrand, vehiclemodel.
> The hierarchy is as follows.. there may be many
vehicletypes.. each
> vehicletype may have many vehiclebrands.. each
vehiclebrand may have
> many models
>
> Suppose there are 3 possible values of vehicletype:
car,truck,bike
> brand for car might be toyota,lexus,ford,honda etc
> brand for bike might be suzuki,honda etc
> models are like modelA, modelB,modelC etc
>
> The person searches for "something
vehiclebrand:lexus". Some results
> will come. I want to give the user the ability to
narrow down/ broaden
> the results depending upon the results recieved.
Suppose 5 modelA
> come, 3 modelB come in the results.
> I will like to give the user a link to narrow down on
one of these
> models, so essentially making the search query as
"something
> vehiclebrand:lexus vehiclebrand:modelA" or
"something
> vehiclebrand:lexus vehiclebrand:modelB"
> Also to allow him to broaden the search results to all
cars rather
> than just lexus cars, so suggesting the query
"something
> vehicletype:car" or the broadest query
"something"
>
> Again, if the user searches for this broadest query
"something", we
> will get suggestion to narrow down either to
vehicletype car or truck
> or bike or maybe even to vehiclebrand:lexus
>
> Possible algo:-
> Traverse all the results, read all the field values of
the indexfields
> for each result and do a frequency analysis. On the
values of the
> indexfields.
>
> Does anything exist which can help me? What are the
classes I need to look at?
>

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Jayant Kr. Gandhi