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Re: RDF vs. relational databases

From: Sören Auer <auer@informatik.uni-leipzig.de>
Date: Tue, 29 Aug 2006 10:39:12 -0400
Message-ID: <44F45190.40904@informatik.uni-leipzig.de>
To: semantic_web@googlegroups.com
CC: "revi s." <reviswami78@yahoo.com>, www-rdf-interest@w3.org

 From my point of view (next to the distribution aspect) flexibility is 
a crucial difference between the RDF based Semantic Web representation 
techniques and databases:

With databases schema changes are very time consuming operations - the 
whole repository and keys have to be reorganized. Triple stores on the 
contrary don't distinguish between data changes and ontology schema 
changes - both are finally just additions or deletions of triples. 
However, triple stores will probably never be able to compete with 
optimized database schemas with respect to query speed. So if you need 
high speed querying and you don't expect many schema changes use a 
RDBMS, if you want to be very flexible with your schema/ontology use a 
triple store. The RDF paradigm is also a bit more holistic in the sense 
that everything from data, schema to metadata is encoded in triples, 
while databases usually have different encoding techniques for each of 
these.

Regards,

Sören
Received on Tuesday, 29 August 2006 14:39:56 GMT

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