Choreography automata are an automata-based model of choreographies, that we show to be a compositional one. Choreography automata represent global views of choreographies (and rely on the well-known model of communicating finite-state machines to model local behaviours). The projections of well-formed global views are live as well as lock- and deadlock-free. In the class of choreography automata we define an internal operation of {\em composition}, which connects two global views via roles acting as interfaces. We show that under mild conditions the composition of well-formed choreography automata is well-formed. The composition operation enables for a flexible modular mechanism at the design level.

中文翻译：

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编舞自动机的组成

编排自动机是一种基于自动机的编排模型，我们将其展示为一个组合模型。编排自动机代表编排的全局视图（并依赖于众所周知的有限状态机通信模型来模拟局部行为）。格式良好的全局视图的投影是实时的，并且是无锁和无死锁的。在编排自动机类中，我们定义了 {\em composition} 的内部操作，它通过充当接口的角色连接两个全局视图。我们表明，在温和条件下，结构良好的编舞自动机的组成是结构良好的。组合操作能够在设计级别实现灵活的模块化机制。