[OPEN-ILS-DEV] Automatic stemming in Evergreen

[Hardy, Elaine]

The exact match should make the search not stem-- matching the exact words
in the search box--- and doesn't limit if there is more to the title (in
this case). When I execute the exact match title search for "The Assist"
in PINES, this title is the third one in a list of thirty. 

Elaine

________________________________


J. Elaine Hardy
PINES Bibliographic Projects & Metadata Manager
Georgia Public Library Service
1800 Century Place, Ste 150
Atlanta, Ga. 30345-4304

404.235-7128
404.235-7201, fax
ehardy at georgialibraries.org
www.georgialibraries.org
www.georgialibraries.org/pines





-----Original Message-----
From: open-ils-dev-bounces at list.georgialibraries.org
[mailto:open-ils-dev-bounces at list.georgialibraries.org] On Behalf Of Kathy
Lussier
Sent: Tuesday, August 14, 2012 12:26 PM
To: open-ils-dev at list.georgialibraries.org
Subject: Re: [OPEN-ILS-DEV] Automatic stemming in Evergreen

Thanks Mike!


> Relating particularly to this example, though, is the (now generally
> unused) relevance adjustment code that targets exactly this problem by 
> boosting the score of (without restricting to) exact word matches.
> One of the hopes with the "convert some stored procedures from perl or 
> plpgsql to C" GSoC project was to make that faster, but the expected 
> improvement didn't materialize quite as expected -- which, I want to 
> make clear, is not the fault of the student -- but I (and, it seems, 
> Dan, too, at least tangentially) will be looking at for 
> Evergreen.NEXT, along with other things like trigram indexing and some 
> other fun stuff.


I'm glad you brought this up because it leads to a question that has
previously crossed my mind. What exactly is an "exact word match" when
it's used for relevance ranking? I ask because an exact match search,
which I believe would use the syntax of "^the assist$", does not work for
this search because the full title (including subtitle) of this book is
"The assist : hoops, hope, and the game of their lives." The exact match
syntax seems to only work if it matches the entire field.

When the relevance adjustment code comes into play, is it also looking for
a full-field match before boosting relevancy for a given title?

Thanks!
Kathy