一句话：提出形式编排语言元模型，统一刻画消息传递系统的全局/局部视图、投影正确性与通信性质。
本文研究消息传递系统的统一形式化基础。作者提出基于形式语言的“形式编排语言”元模型，用其统一描述全局视图、局部视图及其投影，并将从全局视图投影所得局部视图的正确性刻画为一种闭包性质。该框架还给出若干条件，以保证无死锁等通信性质。作者进一步展示该元模型能够捕获已有形式化，包括通信有限状态机、编排自动机和多会话类型；与多数已有方法不同，形式编排语言可以自然建模具有非正则行为的系统。
We introduce a meta-model based on formal languages, dubbed formal choreographic languages, to study message-passing systems. Our framework allows us to generalise standard constructions from the literature and to compare them. In particular, we consider notions such as global view, local view, and projections from the former to the latter. The correctness of local views projected from global views is characterised in terms of a closure property. We consider a number of communication properties -- such as (dead)lock-freedom -- and give conditions on formal choreographic languages to guarantee them. Finally, we show how formal choreographic languages can capture existing formalisms; specifically we consider communicating finite-state machines, choreography automata, and multiparty session types. Notably, formal choreographic languages, differently from most approaches in the literature, can naturally model systems exhibiting non-regular behaviour.
@article{paperbot2201,
title = {A Theory of Formal Choreographic Languages},
author = {Franco Barbanera and Ivan Lanese and Emilio Tuosto},
journal = {Logical Methods in Computer Science},
volume = {Volume 19, Issue 3},
year = {2023},
doi = {10.46298/lmcs-19(3:9)2023}
}