QUIOW: A keyword-based query processing tool for RDF datasets and relational databases

Abstract

This paper describes a keyword-based query processing tool, called QUIOW, deployed in two distinct environments: RDF datasets with schemas and relational databases. The tool first translates a keyword-based query into an abstract query, and then compiles the abstract query into a concrete (SPARQL or SQL) query such that each result of concrete query is an answer for the keyword-based query. The tool explores the schema to avoid user intervention during the translation process. The paper includes extensive experiments to compare keyword-based query processing in the two environments, using a full version of IMDb – The Internet Movies Database and the Mondial database.