S-Space College of Business Administration/Business School (경영대학/대학원) Institute of Information and Operation Management (경영정보연구소) Journal of information and operations management (경영정보논총) Journal of information and operations management vol.07 (1997) (경영정보논총)
객체 지향 언어를 이용한 개념적 데이타 모델 구현에 관한 연구
- Issue Date
- 서울대학교 경영정보연구소
- Journal of information and operations management, Vol.07, pp. 117-139
- Lack of support for Entity-Relationship (ER) semantics in object-oriented programming languages (OOPL) remains a key roadblock to the effective object-oriented systems development. We extend the object-oriented programming language Smalltalk with Entity-Relationship semantics including entity integrity constraints, cardinality constraints, and set-oriented data access. The meta-classes: PermanentObject, EntityObject, Relationship, and JoinClass provide the necessary structures and operations to support Entity-Relationship semantics. These meta-classes greatly reduce efforts to implement an Entity-Relationship model into an object system.