Re: [greenstone-users] Search in GSDL

From Katherine Don
DateTue, 08 Jun 2004 13:33:08 +1200
Subject Re: [greenstone-users] Search in GSDL
In-Reply-To (000c01c44aff$1867fac0$59a2d2aa-unsj-edu-ar)
Hi

Searching for FISICA will find all the items you have specified, because
searching is done on a word basis - all your items have FISICA in them.
We do not allow wildcards (eg *) in search terms.

If you want proper root searching, you can accomplish this using
stemming. You can turn stemming on by going to the preferences page and
selecting "ignore word endings".

This uses a stem index which has been created by generating the stem of
each word and indexing that. For example, computer, computing,
computation etc all have the same stem.

If stemming is turned on for a query, then a search for a word will
match all words that have the same stem.

So you could try turning stemming on, then searching for FISICA,

Unfortunately, we only have english and french stemmers. and english is
used by default. Using english stemming for other languages may or may
not give you all the hits - it will depend on the types of word endings
used.
But its worth a try, and you should get more hits using stemming than
without it.

Regards,
Katherine Don

Luis Alberto Olguin wrote:
> Hi all,
> Somebody could inform to me if is possible in GSDL 2.5 to implement
> search by root?, it is to say to look for "FISIC*" to obtain a list with
> "FISICA", "FISICA CUANTICA", "FISICA and QUIMICA", etc. Thanks,
>
> Podr?a alguien informarme si es posible en GSDL 2.5 implementar
> busquedas por raiz?, es decir buscar FISIC* para obtener una lista con
> FISICA, FISICA CUANTICA, FISICA Y QUIMICA etc.
>
> Gracias,
>
>
>
> Prog. Luis Alberto Olguin
> Instituto de Inform?tica
> Universidad Nacional de San Juan
> Argentina
>
>
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