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CSCW
1996
ACM

An Integrating, Transformation-Oriented Approach to Concurrency Control and Undo in Group Editors

13 years 7 months ago
An Integrating, Transformation-Oriented Approach to Concurrency Control and Undo in Group Editors
Concurrency control and group undo are important issues in the design of groupware, especially for interactive group editors. We present an improved versionofanexistingdistributed algorithm for concurrency control that is based on operation transformations. Since the usability of the algorithm relies on its formal correctness, we present a set of necessary and sufficient conditions to be satisfied in order to ensure consistency in a replicated architecture. We identify desirable properties of operation transformations and show how our approach can be employed to implement group undo. The approach has been applied to build a prototypical group editor for text; some experiences gained are presented. Keywords Concurrency Control, Group Editors, Group Undo, Groupware, Interaction Model, Operation Transformation.
Matthias Ressel, Doris Nitsche-Ruhland, Rul Gunzen
Added 08 Aug 2010
Updated 08 Aug 2010
Type Conference
Year 1996
Where CSCW
Authors Matthias Ressel, Doris Nitsche-Ruhland, Rul Gunzenhäuser
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