RE: Relational databases

Andy,

You may also find some of the work going on at Endeca quite interesting.  We
have developed a library interface that uses a faceted interpretation of the
MARC record (not unlike the FAST project at OCLC) and enables search fused
with this navigation.  As part of that, we read in the LOC classification
schedule (we considered Dewey; swapping is a few days' work), in addition to
several other navigation constructs (e.g., geography = 651$a/600's$z, etc.)
So, a user can execute a search on, say, "baseball" and then navigate by LOC
class within the search results, and then cross that LOC class navigation
with a particular geography (for instance, Japan).

The main reason I write - we considered a database approach, but found it
expensive/challenging to accommodate requirements for dimensionality,
real-time navigation, and certain important features like fusing navigation
with search (the joins became too intense, among other problems).  The
search, in particular, was important - it seemed that users wanted this
familiar tool to at least take a first crack at reducing the universe of
results.  If there is interest within this group, I can send out some
snapshots, or arrange a better/live description (the snapshots are ~700K in
PowerPoint, so I don't want to crunch anyone's mailbox).

Cheers,

Matt.

-----Original Message-----
From: Claudio Gnoli [mailto:[email protected]]
Sent: Monday, February 23, 2004 10:22 AM
To: [email protected]
Subject: [facetedclassification] Relational databases


""" [Andy Schriever : Jan 8]
one can apply the power of the RDBMS query engine 
to knowledge representation techniques such as semantic 
networks, class and object structures, and hierarchical 
classifications.
"""

Andy, you may find relevant for your purposes the work by 
View-based systems <http://www.view-based-systems.com>, 
where Steven Pollitt and Amanda Tinker have developed
several tools and applications for library catalogues and other 
databases, with special reference to the Dewey Decimal
Classification.

Best whishes.



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