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From DB-nets to Coloured Petri Nets with Priorities

机译:从优先级数据库到有色Petri网

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The recently introduced formalism of DB-nets has brought in a new conceptual way of modelling complex dynamic systems that equally account for the process and data dimensions, considering local data as well as persistent, transactional data. DB-nets combine a coloured variant of Petri nets with name creation and management (which we call v-CPN), with a relational database. The integration of these two components is realized by equipping the net with special "view" places that query the database and expose the resulting answers to the net, with actions that allow transitions to update the content of the database, and with special arcs capturing compensation in case of transaction failure. In this work, we study whether this sophisticated model can be encoded back into v-CPNs. In particular, we show that the meaningful fragment of DB-nets where database queries are expressed using unions of conjunctive queries with inequalities can be faithfully encoded into v-CPNs with transition priorities. This allows us to directly exploit state-of-the-art technologies such as CPN Tools to simulate and analyse this relevant class of DB-nets.
机译:最近引入的DB-net形式主义带来了一种新的概念化方式,可以对复杂的动态系统进行建模,该系统同时考虑到本地数据以及持久性事务性数据,从而平等地考虑了流程和数据维度。 DB-net将Petri网的彩色变体与名称创建和管理(我们称为v-CPN)与关系数据库结合在一起。这两个组件的集成是通过为网络配备特殊的“视图”场所来查询数据库并向网络公开最终答案的方法,并通过允许过渡来更新数据库内容的操作以及捕获补偿的特殊弧来实现的。以防交易失败。在这项工作中,我们研究了这种复杂的模型是否可以编码回v-CPN。尤其是,我们表明,可以使用具有不等式的联合查询的并集来表示数据库查询的DB-net有意义的片段,可以忠实地编码为具有转换优先级的v-CPN。这使我们可以直接利用诸如CPN工具之类的最新技术来模拟和分析此类相关的DB-net。

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