A UML Pattern Language by Paul Evitts

By Paul Evitts

A UML trend Language pairs the software program layout trend proposal with the Unified Modeling Language (UML) to supply a device set for software program pros practising either process modeling and software program improvement. This e-book presents: a set of styles within the area of approach modeling, together with those who are necessary to administration, operations, and deployment groups, in addition to to software program builders; a survey of the advance of styles and the UML; a dialogue of the underlying idea of the styles and directions for utilizing the language; a radical exploration of the layout approach and model-driven improvement. A UML trend Language acknowledges that layout and modeling became equivalent companions with programming and coding within the firm of software program improvement. offering either an figuring out of the paintings of layout and how styles and the UML mix to facilitate layout.

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Dependencies can be used to identify connections between a variety of model elements, packages being a notable example. These are unidirectional relationships. 15. Dependency. 16). Class inheritance is represented this way, but generalization can be used more generally. Again, packages are an example. 16. Generalization. 17). It is also used to identify the communication path between an actor and a use case. The Unified Modeling Language Reference Manual describes associations as "the glue that ties systems together" (Jacobson, Booch, and Rumbaugh 1998b, 47).

Paths are always attached to symbols at both ends (that is, no dangling lines are allowed). • Containment— Boxes, circles, and other fully enclosed shapes contain symbols, icons, and lines. • 42 Visual attachment— Elements that are close together may have a relationship suggested by their proximity. For example, a name above a line or next to a box may be interpreted as applying to the line or box. 2 Packages A package is a grouping of UML elements, which can include diagrams and may include subordinate packages and other kinds of model elements.

This is the second significant characteristic of the UML: its independence of process, programming language, and technique. By being process-independent, it is unique among modeling languages. All of the structured modeling techniques and object-oriented modeling languages that existed previously were extensions of a methodology or process. Originally, the creators of UML wanted to unify their different object-oriented development methods into one process. Initial discussions showed the task to be more difficult than they imagined.

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