On the Top-k Retrieval Problem for Ontology-Based Access to Databases
In Flexible Approaches in Data, Information and Knowledge Management, Studies in Computational Intelligence, Volume 497, Chapter 5, pages 95-114, Springer Verlag, 2014. ISBN 978-3-319-00953-7
Abstract:
The paper is a succinct summary on the problem of evaluating ranked top-k queries in the context of
ontology-based access over relational databases. An ontology layer is used to define the relevant abstract
concepts and relations of the application domain, while facts with associated score are stored into a
relational database. Queries are conjunctive queries with ranking aggregates and scoring functions. The
results of a query may be ranked according to the score and the problem is to find efficiently the top-k
ranked query answers.