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    PetriPad – A Collaborative Petri Net Editor

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    Abstract. Collaboration is one of the key aspects of software engineering and commonly includes working in spatially separated teams. Many tools exist to support such a workflow and are used extensively, especially for real-time communication, e.g. instant messaging systems and voice chats. In contrast, programming environments and editors used in general mostly lack synchronous real-time collaboration functionality. In this work we present an informal specification of such a system in the context of a groupware Petri net editor and the implementation of our model as a proof of concept for the Renew tool. To do this we revisit work on this subject done more than 10 years ago and update the proposed models to the current state of software engineering. As a result we are able to simplify the specification
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