Transforming RDB schema into well-structured OODB schema

When transforming relational database (RDB) schema into object-oriented dat abase(OODB) schema, much effort was put on examining key and inclusion depe ndency (ID) constraints to identify class and establish inheritance and ass ociation between classes. However, in order to further remove the original data redundancy and update anomaly, multi-valued dependency (MVD) should al so be examined. In this paper, we discuss class structures and define well- structured classes. Based on MVDs, a theorem is given transforming a relati on schema into a well-structured class. To transform. RDB schema into OODB schema, a composition process simplifying the input RDB schema and an algor ithm transforming the simplified RDB schema into well-structured OODB class es are developed. (C) 1999 Elsevier Science B.V. All rights reserved.