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From Shane O'Sullivan <shaneosulliv...@gmail.com>
Subject Re: Global Analysis possible in Lucene?
Date Tue, 06 Sep 2005 08:57:37 GMT
Joaquin

Thanks for that. I'm not trying to accomplish anything myself right now - my 
employer asked me to do a technical evaluation of Lucene, and provided me 
with a list of areas I was to look in to, just to see if Lucene has certain 
capabilities. Global Analysis was one of the "would like" rather than "must 
have" functions, but I couldn't find any information on it on the web.

Have you built GCA on top of Lucene? If so, how difficult was it from the 
Lucene perspective? (As opposed to the GCA itself, which I understand is 
quite tricky). Do you know of any open source applications of GCA on top of 
Lucene?

Thanks

Shane

On 9/6/05, Joaquin Delgado <joaquin@triplehop.com> wrote:
> 
> I think Shane is refering to Global Context Analysis (vs. Local Context
> Analysis), which refers to a statistical anlisys of the context
> (sourrounding windows) around noun-phrases from the index for automatic
> thesauri construction and query expansion.
> 
> For more info, read the SIGIR'96 paper from Xu and Croft:
> 
> http://citeseer.ifi.unizh.ch/cache/papers/cs/508/http:zSzzSzwww.cs.umass.edu
> zSz~xuzSzsigir96-final.pdf/xu96query.pdf
> 
> Shane: In principle, Lucene does provide all the tools needed to perform 
> GCA
> and LCA but there is nothing built directly in the API do perform these
> types of analysis. I've done some work in this area (more on variants of
> LCA) so if you provide me with more information on what you are trying to
> achieve, I might be able to help you.
> 
> -- Joaquin
> 
> -----Original Message-----
> From: Erik Hatcher [mailto:erik@ehatchersolutions.com]
> Sent: Thursday, September 01, 2005 12:49 PM
> To: java-dev@lucene.apache.org
> Subject: Re: Global Analysis possible in Lucene?
> 
> Shane - could you give us some details on what Global Analysis is and how 
> it
> relates to full-text searching?
> 
> I googled for it and came up with some heavy duty mathematical stuff, but
> did not see a direct relationship with information retrieval.
> 
> Erik
> 
> 
> On Sep 1, 2005, at 9:36 AM, Shane O'Sullivan wrote:
> 
> > Hi,
> >
> > Does anyone know if Lucene supports Global Analysis? I haven't seen
> > any documentation on it.
> >
> > Thanks
> >
> > Shane O'Sullivan
> >
> 
> 
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