values for a new data type Event - when it occurs on an Object it may cause a Transition in a State machine diagram Expansion region - a set of Actions in an Activity diagram that occur once for each of a collection of input Tokens to the Expansion Region Extend - a means to use a class as a starting point for creation of a new class. The new class inherits all of the attributes, properties, and methods of the class it extends. Exception - F File - Final state - the state at which an object ceases to exist Flow - a navigational connection between two Actions Flow Final - the point at which a Flow ends without ending the complete Activity Fork - a point in an Activity diagram where a Flow of logic splits into several concurrent Flows (Threads) Found Message - starting point for a Sequence diagram G Generalization - a relationship between a specific classifier (typically a class) to a more general classifier asserting that the general classifer contains common features among both the specific classifier and the general classifier. Features include, for example, properties, and constraints. The use of generalization is often logically restricted to cases where the specific classifier is a "kind-of" or "sort-of" the general classifier: for example, a Boxer is a "kind-of" Dog. When the classifiers involved are software engineering classes, generalization usually involves reusing code; it is often implemented using inheritance, where the more specific code reuses the more general code. Generalization Tree - Several specialized classifiers may point to the same general classifier, forming a generalization tree, where the general classifer contains common features shared by all the specialized versions. As generalization is a relationship, it is possible for a classifer to participate in several generalizations, often being on the specific end or on the general end, forming a directed acyclic graph (DAG) (i.e., no loops). Generic - Guard - a boolean test that must be satisfied for a Flow of an activity diagram or a Transition of a state machine diagram to be allowed to start H Hierarchy - History pseudostate - points to the initial state of an object where no previous state history was saved I Inheritance - where a new more specific Class derives part of its definition from an existing more general Class Initial node - the start point of an Activity diagram