Activity final - the end point of an activity diagram. When a thread reaches an Activity Final node, all the threads of the activity terminate. (Contrast with Flow Final node, which marks the end of one thread.) Actor - a role that a user takes when invoking a use case. Also see actor modeling. Aggregation - 1. a special type of association used to represent a stronger relationship between two classes than a regular association; typically read as "owns a", as in, "Class A owns a Class B". A hierarchy of classes where the child object may or may not continue to exist if the parent object is destroyed; see 'composition'. 2. An aggregation is a structural relationship that specifies that one class represents a large thing which constitute of smaller things and represents "has-a" relationship. Artifact - items that model physical pieces of information in your system, such as a user's manual, training material, or password file Association - 1. a relationship with 2 or more ends, where each end is on a class (or other classifier). Each end is called a Role, and may have a role name, Multiplicity, and may be Navigable. 2. An association is a structural relationship that specifies that the objects of one thing are connected with the objects of another. Association class - a class that describes an association. Asynchronous - The sender of an asynchronous message does not wait for a response. Attribute - a significant piece of data owned by a Class, often containing values describing each instance of the class. Besides the attribute name and a slot for the attribute value, an attribute may have specified Visibility, Type, Multiplicity, Default value, and Property-string. B Block - Block is a place where all the aggregates are collected at one place BPM - Business Process Model, is used to define the process followed by the business. It is a high level design for the business process. BPMN - Business Process Modelling Notations, are used to define the process on paper with the help of predefined shapes of UML. C Call - Cardinality - the current number of occurrences of a Property. The cardinality must be a value that is allowed by the multiplicity Child - Class - the primary declarative construct of object-oriented programming; a cohesive unit of Attributes and Operations; a compile-time template for an Object Class diagram - a type