relationship

Relationship

An abstract_object that is what one thing has to do with one or more others.

Attributes

• member_of : A member_of relationship type where a relationship is a member_of a class_of_relationship.

Subtypes

• aggregation
• classification
• defined_relationship
• function_
• specialization

EXPRESS Specification

Schema

ENTITY relationship
  ABSTRACT 
  SUPERTYPE OF (ONEOF(classification, aggregation, specialization, defined_relationship, function_))
  SUBTYPE OF (abstract_object);
    member_of: OPTIONAL SET [1:?] OF class_of_relationship;
END_ENTITY;

Inheritance Graph

ENTITY relationship;
  ENTITY thing;
    member__of : OPTIONAL SET [1:?] OF class;
  ENTITY abstract_object;
  ENTITY relationship;
    member_of  : OPTIONAL SET [1:?] OF class_of_relationship;
END_ENTITY;