A Theoretical Formulation of Object-Oriented Rough Set Models

ata forms, and abstract structural hierarchy based on is-a relationship and has-a relationship. Object structures illustrate many kinds of objects and actual dependence among objects by is-a relationship and has-a relationship. Name structures provide concrete design of objects, and connect class structures and object structures consistently. Next, combining class, name and object structures, we propose objectoriented information systems, which include "traditional" information systems as special cases. Moreover, we introduce indiscernibility relations on the set of objects, lower and upper approximations, and object-oriented rough sets in the object-oriented information systems.

• Type: Journal
• Year: 2006
• Where: JACIII
• Authors: Yasuo Kudo, Tetsuya Murai
• Keywords: Has-a Relationship, Information Systems, Is-a Relationship, JACIII 2006