4 research outputs found

    Enhancing Workflow Data Interaction Patterns by a Transaction Model

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    Abstract. Todays process-aware information systems (PAIS) provide little support for explicit specification of transactional aspects. PAIS have to integrate events and data from various external sources as workflow relevant data. Furthermore, it should be aware of changes made externally and write consistently back data used and altered to external sources. To avoid inconsistencies within redundantly maintained data, transactional aspects within process and data perspective have to be supported. We present a layered architecture which overcomes most of these problems by extending a workflow management system (YAWL) with facilities to access external data sources, to associate the control flow perspective with transactional properties like isolation, serializability and recovery. To ensure a better data integrity, we define synchronization strategies and integrity constraints beyond single objects and tasks. Furthermore, we integrate transactional and non-transactional sources to offer better data security, data persistence and data recovery within our workflow model

    Flexible, datengetriebene Workflows fĂĽr den Publikationsprozess in digitalen Bibliotheken

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    Ziel der Arbeit war die Entwicklung eines Workflow-Management-Systems, das Dokumente aus externen Datenquellen einbinden kann und die flexible Adaption von Prozessinstanzen ermöglicht. Den transaktionalen Zugriff auf externe Datenquellen ermöglicht der entwickelte tx+YAWL-Ansatz. Für den konsistenten Zugriff auf externe Datenquellen wird ein Mehrebenen-Transaktionsmodell verwendet. Die flexible, datengetriebene Anpassung von Prozessinstanzen ermöglicht der FlexY-Ansatz. Prozessbausteine werden zur Laufzeit für die flexible Konstruktion und Ausführung von Prozessbereichen verwendet
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