### Abstract

We formalize the AutoFocus Semantics (a time-synchronous subset of the Focus formalism) as stream processing functions on finite and infinite message streams represented as finite/infinite lists. The formalization comprises both the conventional single-clocking semantics (uniform global clock for all components and communications channels) and its extension to multi-clocking semantics (internal execution clocking of a component may be a multiple of the external communication clocking). The semantics is defined by generic stream processing functions making it suitable for simulation/code generation in Isabelle/HOL. Furthermore, a number of AutoFocus semantics properties are formalized using definitions from the IntervalLogic theories.

### License

BSD License

### Topics

- Computer science/Programming languages/Language definitions

### Session AutoFocus-Stream

- ListSlice
- AF_Stream
- AF_Stream_Exec
- IL_AF_Stream
- IL_AF_Stream_Exec

### Depends on

- Interval Temporal Logic on Natural Numbers

## Cite

×

AutoFocus-Stream-AFP

    @article{AutoFocus-Stream-AFP,
      author  = {David Trachtenherz},
      title   = {AutoFocus Stream Processing for Single-Clocking and Multi-Clocking Semantics},
      journal = {Archive of Formal Proofs},
      month   = {February},
      year    = {2011},
      note    = {\url{https://isa-afp.org/entries/AutoFocus-Stream.html},
                 Formal proof development},
      ISSN    = {2150-914x},
    }

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