Concurrency control in groupware systems
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Groupware: some issues and experiences
Communications of the ACM
Interacting with Computers
A selective undo mechanism for graphical user interfaces based on command objects
ACM Transactions on Computer-Human Interaction (TOCHI)
A framework for undoing actions in collaborative systems
ACM Transactions on Computer-Human Interaction (TOCHI)
An integrating, transformation-oriented approach to concurrency control and undo in group editors
CSCW '96 Proceedings of the 1996 ACM conference on Computer supported cooperative work
Operational transformation in real-time group editors: issues, algorithms, and achievements
CSCW '98 Proceedings of the 1998 ACM conference on Computer supported cooperative work
Operation transforms for a distributed shared spreadsheet
CSCW '98 Proceedings of the 1998 ACM conference on Computer supported cooperative work
User Centered System Design; New Perspectives on Human-Computer Interaction
User Centered System Design; New Perspectives on Human-Computer Interaction
Undo any operation at any time in group editors
CSCW '00 Proceedings of the 2000 ACM conference on Computer supported cooperative work
Undoing any operation in collaborative graphics editing systems
GROUP '01 Proceedings of the 2001 International ACM SIGGROUP Conference on Supporting Group Work
Undo as concurrent inverse in group editors
ACM Transactions on Computer-Human Interaction (TOCHI)
Achieving undo in bitmap-based collaborative graphics editing systems
CSCW '02 Proceedings of the 2002 ACM conference on Computer supported cooperative work
Improving real-time collaboration with highlighting
Future Generation Computer Systems - Special issue: Advanced services for clusters and internet computing
Operational transformation for collaborative word processing
CSCW '04 Proceedings of the 2004 ACM conference on Computer supported cooperative work
Operation context and context-based operational transformation
CSCW '06 Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work
An empirical evaluation of undo mechanisms
Proceedings of the 4th Nordic conference on Human-computer interaction: changing roles
Bridging patterns: An approach to bridge gaps between SE and HCI
Information and Software Technology
Coordination for multi-person visual program development
Journal of Visual Languages and Computing
CLAF: Solving intention violation of step-wise operations in CAD groupware
Advanced Engineering Informatics
Using task models for cascading selective undo
TAMODIA'06 Proceedings of the 5th international conference on Task models and diagrams for users interface design
Undo-based access control for distributed collaborative editors
CDVE'09 Proceedings of the 6th international conference on Cooperative design, visualization, and engineering
An algorithm for selective undo of any operation in collaborative applications
Proceedings of the 16th ACM international conference on Supporting group work
Toward undoing in composite web services
Architecting Dependable Systems III
Regional undo/redo techniques for large interactive surfaces
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Guaranteeing Correctness for Collaboration on Documents Using an Optimal Locking Protocol
International Journal of Distributed Systems and Technologies
Achieving convergence in operational transformation: conditions, mechanisms and systems
Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
Exhaustive search of puzzles in operational transformation
Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
A group Undo/Redo method in 3D collaborative modeling systems with performance evaluation
Journal of Network and Computer Applications
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Providing undo functionality in groupware has been identified as an important, but difficult problem. Existing solutions show deficiencies like lacking generality, being too complex, being inefficient, or failing to yield acceptable results in common situations. In this paper we describe a new approach which reduces local group undo to a transformation-based method for combining the effects of concurrently issued user commands. Besides transformations we introduce mirror and folding operators in order to build a unique and consistent multidimensional model of the user interaction. In this way the problems of group undo mentioned above can be either overcome or at least reduced.