Chapter 6. Modeling Structure with Blocks

This chapter addresses modeling the structure of systems in terms of their hierarchy and interconnection. It describes blocks—the principle structural construct—and the two types of diagrams used to represent structure—the block definition diagram and the internal block diagram.


The block is the modular unit of structure in SysML that is used to define a type of system, system component, or item that flows through the system, as well as conceptual entities or logical abstractions. The block describes a set of uniquely identifiable instances that share the block’s definition.

The block definition diagram is used to define block characteristics in terms of their structural and behavioral features, ...

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