Semantic Relationships

ass and a class which "fills in" parameters . More specific semantics for relationships are directly supported neither by syntax nor by semantics . Relationships can only be represented indirectly, in terms of other constructs of the models Ex.: Bidirectional Relationship Implementation class Employee { friend Department; char * SSN; Department * employer; public: Employee(char* aSSN); ~Employee(); void join_dept Department *); } class Department { friend Employee; char * name; Set<Employee *> employs; public: Department(char* aName); ~Department(); void add_employee(Employee *); void delete_employee(Employee *); } . Relationship implemented by two attributes (employer from each Employee to a Department and employs from each Department to a set of Employees) Manuel Kolp - 2001 Semantic Relationships 5 Relationships: Problems in languages and systems . Duplication of information . Dispersion of the relationship knowledge . Too early decisions in the de