Domain Specific Architectures

1. Generic models: Derived from a number of real systems. ``Bottom-Up.'' Capture principal characteristics. Describe a limited class of system.

2. Reference architectures: More abstract, describing a larger class of system. ``Top-Down.'' Not based upon real systems. Instead, reflect application domain.

Generic Models

1. A compiler as the classic example:

    

2. Contrast with the repository model of a compiler.

Reference Architectures

1. A standard which can be used to compare real systems. Introduces terminology to an application domain.

2. OSI reference model as the classic example:

    

3. Intended to promote interconnection of conformant systems. A failure. Layering subverted