Hello Lee,

these bells sound like "SKOS" ;o)

AFAIK Solr does not support thesauri just plain flat synonym lists.

One could implement a thesaurus filter and put it into the end of the analyzer 
chain of solr.

The filter would then do a thesaurus lookup for each token it receives and 
possibly 
* expand the query 
or
* kind of "stem" document tokens to some prefered variants according to the 
thesaurus

Maybe even taking term relations from thesaurus into account and boost queries 
or doc fields at index time.

Maybe have a look at http://poolparty.punkt.at/ a full features SKOS thesaurus 
management server.
It's also providing webservices which could feed such a Solr filter.

Kind regards
Michael


----- Ursprüngliche Mail -----
Von: "lee carroll" <lee.a.carr...@googlemail.com>
An: solr-user@lucene.apache.org
Gesendet: Donnerstag, 2. Dezember 2010 09:55:54
Betreff: SOLR Thesaurus

Hi List,

Coming to and end of a proto type evaluation of SOLR (all very good etc etc)
Getting to the point at looking at bells and whistles. Does SOLR have a
thesuarus. Cant find any refrerence
to one in the docs and on the wiki etc. (Apart from a few mail threads which
describe the synonym.txt as a thesuarus)

I mean something like:

PT: xxxx
BT: xxx,xxxx,xxxx
NT: xxx,xxxx,xxxx
RT:xxx,xxx,xxx
Scope Note: xxxxxx,xxxx

Like i say bells and whistles

cheers Lee

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