B (Glossary)

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The observable effects of an operation or event, including its results.

behavioral diagram

Behavioral diagrams depict the behavioral features of a system or business process. Behavioral diagrams include Activity diagrams, State Machine diagrams, Communication diagrams, Interaction Overview diagrams, Sequence diagrams, Timing diagrams and Use Case diagrams.

behavioral feature

A dynamic feature of a model element, such as an operation or method.

behavioral model aspect

A model aspect that emphasizes the behavior of the instances in a system, including their methods, collaborations, and state histories.

binary association

An association between two classes. A special case of an n-ary association.


The creation of a model element from a template by supplying arguments for the parameters of the template.


A marker in a rich text document that enables you to link inner sections of a document into a master document (using Word insert file function).


An enumeration whose values are true and false.

boolean expression

An expression that evaluates to a boolean value.


1.A stereotyped class that models some system boundary ?typically a user interface screen. It is used in the conceptual phase to capture users interacting with the system at a screen level (or some other boundary interface type). It is often used in sequence and robustness (analysis) diagrams. It is the View in the Model-View-Controller pattern.
2.A System Boundary element is used to delineate a particular part of the system.