FastofD: Contextual data cleaning with ontology functional dependencies

Functional Dependencies (FDs) define attribute relationships based on syntactic equality. As a result, FD-based data cleaning systems incorrectly label syntactically different but semantically equivalent values as errors. To address this problem, we demonstrate FastOFD: a system for discovering Ontology Functional Dependencies (OFDs) which express semantic attribute relationships such as synonyms and is-a hierarchies defined by an ontology In …