Architecture modeling of distributed and concurrent software systems

In order to define a conceptual frame and a suitable vocabulary for this working area, we present the architecture description language MoDeL (Modular Design Language). By selecting and combining modelling concepts which proved to be helpful for the design of software systems, this approach is integrative and pragmatic: It unites different realization paradigms (structured, object-oriented), different levels of granularity (overall system, subsystem, modules, types and operations), different kinds of abstractions (functional/data, types/objects etc.) without falling into a loose collection of diagram languages.