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SysML Distilled: A Brief Guide to the Systems Modeling Language by Lenny Delligatti

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Chapter 3. Block Definition Diagrams

The most common kind of SysML diagram is the block definition diagram. You can display various kinds of model elements and relationships on a BDD to express information about a system’s structure. You can also adopt design techniques for creating extensible system structures, a practice that reduces the time and cost to change your design as your stakeholders’ needs evolve.

3.1. Purpose

The model elements that you display on BDDs—blocks, actors, value types, constraint blocks, flow specifications, and interfaces—serve as types for the other model elements that appear on the other eight kinds of SysML diagrams. We refer to elements that appear on BDDs as elements of definition. Elements of definition, in a ...

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