When to use aggregation and Association in UML?
The aggregation link is usually used to stress the point that Class A instance is not the exclusive container of Class B instance, as in fact the same Class B instance has another container/s. To sum it up association is a very generic term used to represent when one class used the functionalities provided by another class.
When to omit things from UML class diagrams?
– a descriptivelanguage: rigid formal syntax (like programming) – a prescriptivelanguage: shaped by usage and convention – it’s okay to omit things from UML diagrams if they aren’t needed by team/supervisor/instructor Uses for UML • as a sketch: to communicate aspects of system
Who are the founders of the UML language?
– Grady Booch (BOOCH) – Jim Rumbaugh (OML: object modeling technique) – Ivar Jacobsen (OOSE: object oriented software eng) and come up with an industry standard [mid 1990’s]. UML –Unified Modeling Language • Union of all Modeling Languages
What do you need to know about legal UML?
• What is legal UML? – a descriptivelanguage: rigid formal syntax (like programming) – a prescriptivelanguage: shaped by usage and convention – it’s okay to omit things from UML diagrams if they aren’t needed by team/supervisor/instructor Uses for UML
When to use UML with whole part relationship?
Among the many domain meanings that an association can have there is one that can be signified with UML by its own symbol: the whole-part relationship or aggregation. This type of relationship is always used when objects of one class are a part of objects of another class.
When do we use the term generalization in UML?
Generalization is the term that we use to denote abstraction of common properties into a base class in UML. The UML diagram’s Generalization association is also known as Inheritance. When we implement Generalization in a programming language, it is often called Inheritance instead.
Which is a specific case of aggregation and composition?
Aggregation and Composition are subsets of association meaning they are specific cases of association. In both aggregation and composition object of one class “owns” object of another class. But there is a subtle difference: