Architecture: the fundamental organization of a system embodied in its components, their relationships to each other and to the environment and the principles guiding its design and evolution.
- fundamental organization means essential, unifying concepts and principles
- system includes application, system, platform, system-of-systems, enterprise, product line, ...
- environment is developmental, operational, programmatic, … context of the system
A system is a special model, whereby all the things contained in that model (all the system components) are transitively coherent, i.e. all of them are directly or indirectly related to each other form a coherent whole. A system is conceived as having assigned to it, as a whole, a specific characterisation (the so-called "systemic properties").
A model is a purposely abstracted, clear, precise and unambiguous conception.
A model denotation is a precise and unambiguous representation of a model, in some appropriate formal or semi-formal language.
A conception is a special actand resulting from an action whereby a human actor aims at interpreting a perception in his mind, possibly in a specific action context.