Chapter 4 Building Structural Diagrams

Composite structure diagram objects

You can create the following types of objects in a composite structure diagram:

Object	Tool	Symbol	Description
Class			Set of objects sharing the same attributes, operations, methods, and relationships. See Classes (OOM).
Interface			Descriptor for the externally visible operations of a class, object, or other entity without specification of internal structure. See Interfaces (OOM).
Port			Interaction point between a classifier and its environment. See Ports (OOM).
Part			Classifier instance playing a particular role within the context of another classifier. See Parts (OOM).
Generalization			Link between classes showing that the sub-class shares the structure or behavior defined in one or more superclasses. See Generalizations (OOM).
Require Link			Connects classifiers to interfaces. See Require Links (OOM).
Assembly Connector			Connects parts to each other. See Assembly Connectors (OOM).
Delegation Connector			Connects parts to ports on the outside of classifiers. See Delegation Connectors (OOM).
Association			Structural relationship between objects of different classes. See Associations (OOM).
Aggregation			A form of association that specifies a part-whole relationship between a class and an aggregate class (example: a car has an engine and wheels). See Associations (OOM).
Composition			A form of aggregation but with strong ownership and coincident lifetime of parts by the whole; the parts live and die with the whole (example: an invoice and its invoice line). See Associations (OOM).
Dependency			Relationship between two modeling elements, in which a change to one element will affect the other element. See Dependencies (OOM).
Realization			Semantic relationship between classifiers, in which one classifier specifies a contract that another classifier guarantees to carry out. See Realizations (OOM).
Attribute	N/A	N/A	Named property of a class. See Associations (OOM).
Operation	N/A	N/A	Service that can be requested from a class. See Operations (OOM).

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