aggregation (Class modelling) A special form of association that specifies a whole–part relationship between an object class representing the aggregate (whole) and another object class representing the component part.
alternate key (Relational data analysis) A candidate key that is not selected to be the primary key for the relation.
artefact A diagram or supporting description providing a representation of the system of interest.
association (Class modelling) A business link between two object classes. The link is required in order to navigate from one class to another.
association class (Class modelling) An object class that has both association and object class properties.
attribute (Entity relationship modelling and class modelling) ...