Adding Integrity Constraints to OWL
نویسندگان
چکیده
Schema statements in OWL are interpreted quite differently from analogous statements in relational databases. If these statements are meant to be interpreted as integrity constraints (ICs), OWL’s interpretation may seem confusing and/or inappropriate. Therefore, we propose an extension of OWL with ICs that captures the intuition behind ICs in relational databases. We show that, if the constraints are satisfied, we can disregard them while answering a broad range of positive queries.
منابع مشابه
Adding Integrity Constraints to the Semantic Web for Instance Data Evaluation
This paper presents our work on supporting evaluation of integrity constraint issues in semantic web instance data. We propose an alternative semantics for the ontology language, i.e., OWL, a decision procedure for constraint evaluation by query answering, and an approach of explaining and repairing integrity constraint violations by utilizing the justifications of conjunctive query answers. ke...
متن کاملGraphical Schema Editing for Stardog OWL/RDF Databases using OWLGrEd/S
The developers of StarDog OWL/RDF DBMS have pioneered a new use of OWL as a schema language for RDF databases. This is achieved by adding integrity constraints (IC), also expressed in OWL syntax, to the traditional “open-world” OWL axioms. The new database paradigm requires a suitable visual schema editor. We propose here a two-level approach for integrated visual UML-style editing of extended ...
متن کاملDomain-Specific OWL Ontology Visualization with OWLGrEd
The OWLGrEd ontology editor allows graphical visualization and authoring of OWL 2.0 ontologies using a compact yet intuitive presentation that combines UML class diagram notation with textual Manchester syntax for expressions. We present an extension mechanism for OWLGrEd that allows adding custom information areas, rules and visual effects to the ontology presentation thus enabling domain spec...
متن کاملMaintaining Integrity Constraints in Semantic Web
As an expressive knowledge representation language for Semantic Web, Web Ontology Language (OWL) plays an important role in areas like science and commerce. The problem of maintaining integrity constraints arises because OWL employs the Open World Assumption (OWA) as well as the Non-Unique Name Assumption (NUNA). These assumptions are typically suitable for representing knowledge distributed ac...
متن کاملTowards Using OWL Integrity Constraints in Ontology Engineering
In the GOPSL ontology engineering methodology, integrity constraints are used to guide communities in constraining their domain knowledge. This paper presents our investigation on OWL integrity constraints and its usage in ontology engineering.
متن کامل