The UML is a language for visualizing, specifying, constructing, and documenting the artifacts of a software-intensive system. As a language, the UML has a well-defined syntax and semantics. The most visible part of the UML's syntax is its graphical notation.
This appendix summarizes the elements of the UML notation.
Structural things are the nouns of UML models. These include classes, interfaces, collaborations, use cases, active classes, components, and nodes.
Behavioral things are the dynamic parts of UML models. These include interactions ...