On the Top-k Retrieval Problem for Ontology-Based Access to Databases [chapter]

Umberto Straccia
2013 Studies in Computational Intelligence  
The chapter 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
more » ... ficiently the top-k ranked query answers. U. Straccia (B)
doi:10.1007/978-3-319-00954-4_5 fatcat:wq725kq5svcedjietrtez3rsaq