LDA (Latent Dirichlet Allocation) is a similar technique that extends pLSI.
You can find some implementation in C++ and Java on the Web.
Grant Ingersoll 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 <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]> 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
--
Renaud Delbru,
E.C.S., M.Sc. Student,
Semantic Information Systems and
Language Engineering Group (SmILE),
Digital Enterprise Research Institute,
National University of Ireland, Galway.
http://smile.deri.ie/
