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From "Eswar K" <kja.es...@gmail.com>
Subject Re: LSA Implementation
Date Tue, 27 Nov 2007 02:06:38 GMT
We essentially are looking at having an implementation for doing search
which can return documents having conceptually similar words without
necessarily having the original word searched for.

- Eswar

On Nov 27, 2007 12:06 AM, Grant Ingersoll <gsingers@apache.org> wrote:

> Interesting.  I am not a lawyer, but my understanding has always been
> that this is not something we could do.
>
> The question has come up from time to time on the Lucene mailing list:
>
> http://www.gossamer-threads.com/lists/engine?list=lucene&do=search_results&search_forum=forum_3&search_string=Latent+Semantic&search_type=AND
>
> That being said, there may be other approaches that do similar things
> that aren't covered by a patent, I don't know.
>
> Is there something specific you want to do, or are you just going by
> the promise of better results using LSI?
>
> I suppose if someone said they had a patch for Lucene/Solr that
> implemented it, we could ask on legal-discuss for advice.
>
> -Grant
>
> On Nov 26, 2007, at 1:13 PM, Eswar K wrote:
>
> > I was just searching for info on LSA and came across Semantic Indexing
> > project under GNU license...which of couse is still under
> > development in C++
> > though.
> >
> > - Eswar
> >
> > On Nov 26, 2007 9:56 PM, Jack <jlist9@gmail.com> wrote:
> >
> >> Interesting. Patents are valid for 20 years so it expires next
> >> year? :)
> >> PLSA does not seem to have been patented, at least not mentioned in
> >> http://en.wikipedia.org/wiki/Probabilistic_latent_semantic_analysis
> >>
> >> On Nov 26, 2007 6:58 AM, Grant Ingersoll <gsingers@apache.org> wrote:
> >>> LSA (http://en.wikipedia.org/wiki/Latent_semantic_indexing) is
> >>> patented, so it is not likely to happen unless the authors donate
> >>> the
> >>> patent to the ASF.
> >>>
> >>> -Grant
> >>>
> >>>
> >>>
> >>> On Nov 26, 2007, at 8:23 AM, Eswar K wrote:
> >>>
> >>>> All,
> >>>>
> >>>> Is there any plan to implement Latent Semantic Analysis as part of
> >>>> Solr
> >>>> anytime in the near future?
> >>>>
> >>>> Regards,
> >>>> Eswar
> >>>
> >>> --------------------------
> >>> Grant Ingersoll
> >>> http://lucene.grantingersoll.com
> >>>
> >>> Lucene Helpful Hints:
> >>> http://wiki.apache.org/lucene-java/BasicsOfPerformance
> >>> http://wiki.apache.org/lucene-java/LuceneFAQ
> >>>
> >>>
> >>>
> >>>
> >>
>
> --------------------------
> Grant Ingersoll
> http://lucene.grantingersoll.com
>
> Lucene Helpful Hints:
> http://wiki.apache.org/lucene-java/BasicsOfPerformance
> http://wiki.apache.org/lucene-java/LuceneFAQ
>
>
>
>

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