this paper proposes a solution for migrating an RDB into Web semantic. The solution takes an existing RDB as input, and extracts its metadata representation (MTRDB). Based on the MTRDB, a Canonical Data Model (CDM) is generated. Finally, the structure of the classification scheme in the CDM model is converted into OWL ontology and the recordsets of database are stored in owl document. A prototy...

Modern technologies of Semantic Web, the growing complexity of information systems, the needs of knowledge bases and smart Web agents require conceptual models to gain an improved form of semantic knowledge models – i.e. ontology. Currently, the main technique of storing ontology is based on files containing descriptions of ontology in RDF/RDFS or OWL. On the other hand, the relational database...

We propose a new technique for approximate ABox reasoning with OWL DL ontologies. Essentially, we obtain substantially improved reasoning performance by disregarding non-Horn features of OWL DL. Our approach comes as a side-product of recent research results concerning a new transformation of OWL DL ontologies into negation-free disjunctive datalog [1, 2, 3, 4], and rests on the idea of perform...

Reasoning on OWL ontologies is known to be intractable in the worst-case, which is a serious problem because in practice, most OWL ontologies have large Aboxes, i.e., numerous assertions about individuals and their relations. We propose a technique that uses a summary of the ontology (summary Abox) to reduce reasoning to a small subset of the original Abox, and prove that our techniques are sou...

............................................................................................................................................... iii Acknowledgements ......................................................................................................................... iv . Introduction ..............................................................................................

Despite the vast improvement in techniques and technology for arthroscopic rotator cuff surgery, repairs of massive and large tears remain challenging because they are associated with significantly high failure rates. In recent years, patch augmentation has gained popularity as a technique to decrease these high failure rates. Arthroscopic patch augmentation of rotator cuff repair, however, is ...

This paper describes a software tool that implements an instancebased schema matching technique for OWL dialects. The technique is based on a matching algorithm that depends on the definition of similarity functions that evaluate the semantic proximity of elements from two different schemas. The tool is engineered to accommodate different similarity functions and variations of the matching algo...