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- W2098926504 abstract "Workflow management systems (WFMS) are software systems that coordinate the tasks human workers and computers have to perform to achieve a certain goal based on a given workflow description. Due to changing circumstances, it happens often that some tasks in a running workflow need to be performed differently than originally planned and specified. Most commercial WFMSs cannot deal with the required run-time changes properly. These changes have to be specified at the level of the underlying Petri-Net based semantics. Moreover, the implicit external state has to be adapted to the new task as well. Such low-level updates can easily lead to wrong behaviour and other errors. This problem is known as the dynamic change bug. In the iTask WFMS, workflows are specified using a radically different approach: workflows are constructed in a compositional style, using pure functions and combinators as self-contained building blocks. This paper introduces a change concept for the iTask system where self-contained tasks can be replaced by other self-contained tasks, thereby preventing dynamic change bugs. The static and dynamic typing system furthermore guarantees that these tasks have compatible types." @default.
- W2098926504 created "2016-06-24" @default.
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- W2098926504 date "2011-01-24" @default.
- W2098926504 modified "2023-09-24" @default.
- W2098926504 title "iTasks for a change" @default.
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- W2098926504 doi "https://doi.org/10.1145/1929501.1929528" @default.
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