Modularization and automatic composition of object-role modeling (ORM) schemes

Abstract. In this paper we present a framework and algorithm for modularization and composition of ORM schemes. The main goals of modularity are to enable and increase reusability, maintainability, distributed development of ORM schemes. Further, we enable effective browsing and management of such schemes through libraries of ORM schema modules. For automatic composition of modules, we present and implement a composition operator: all atomic concepts and their relationships (i.e. fact-types) and all constraints, across the composed modules, are combined together to form one schema (called modular schema)