Logical to physical interfaces
The previous chapters developed interfaces from the functional analysis (Chapter 2, System Specification) and the architecture (Chapter 3, Developing System Architectures). These are all logical interfaces that are defined by a set of logical services or flows. These logical interfaces characterize their logical properties – extent, precision, timeless, and so on – as metadata on those features. In this book, all services in the logical interface are represented as events that may optionally carry information. In this recipe, that information is elaborated on in a physical data schema, refining their physical properties.
The subsystem teams require physical interface specifications, since they are designing and implementing physical systems that will connect in the real world. We must refine the logical interfaces to include their implementation details, including the physical realization of the data, so that the subsystems can be properly...
