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Chapter 2. Definitions, design points, and key concepts 21
Figure 2-1 Two localities and a connection
Connection
Connections are defined as generalized physical linkages. Connections are
characterized by what they carry or transmit and the necessary performance and
quality attributes in order to specify their physical realization at the design level.
They are linked to the concept of a
flow port in SysML, which allows the designer
to specify what can flow through an association and its ports (data, power, fuel).
In UML, connections are represented by stereotyped associations.
Design points
MDSD is intended to provide a framework for reasoning about the whole
spectrum of systems concerns.
Four basic principles
MDSD provides support for constructing a sound architecture on the basis of four
principles: separation of concerns, integration, system decomposition, and
scalability.