Commutativity-Based Concurrency Control for Abstract Data Types
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Concurrency control in groupware systems
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High-latency, low-bandwidth windowing in the Jupiter collaboration system
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Operation transforms for a distributed shared spreadsheet
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Time, clocks, and the ordering of events in a distributed system
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Concurrent Operations in a Distributed and Mobile Collaborative Environment
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Reconciliation service for copies synchronisation
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Concept and prototype of a collaborative business process environment for document processing
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Consistency maintenance based on the mark & retrace technique in groupware systems
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A landmark-based transformation approach to concurrency control in group editors
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Formal design and verification of operational transformation algorithms for copies convergence
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An operational transformation based synchronization protocol for web 2.0 applications
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Optimistic access control for distributed collaborative editors
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Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
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In real-time collaborative systems, replicated objects, shared by users, are subject to concurrency constraints. In order to satisfy these, various algorithms, qualified as op冒timistic, [3, 5, 13, 17, 14, 15, 18], have been proposed that exploit the semantic properties of operations to serialize concurrent operations and achieve copy con冒vergence of replicated objects. Their drawback is that they either re冒quire a condition on user's operations which is hard to verify when possible to ensure, or they need undo冒ing then redoing operations in some situations. The main purpose of this paper is to present two new algorithms that over冒come these drawbacks. They are based upon the imple冒mentation of a continuous global order which enables that condition to be released, and simplifies the operation inte冒gration process. In the second algorithm, thanks to de冒ferred broadcast of operations to other sites, this process becomes even more simplified.