Undo any operation at any time in group editors

@inproceedings{Sun2000UndoAO,
  title={Undo any operation at any time in group editors},
  author={Chengzheng Sun},
  booktitle={CSCW '00},
  year={2000}
}
The ability to undo operations is an indispensable feature of real-time group editors, but supporting group undo is a difficult problem. None of the existing solutions for group undo is able to support undoing any operation at any time with guaranteed success. In this paper, we contribute a novel group undo solution with such a capability. The basic idea is to interpret an undo command as a concurrent inverse operation by means of operational transformation, so that an operation is always… 
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Undo as concurrent inverse in group editors
TLDR
The proposed undo solution consists of a generic transformation control algorithm that is capable of generating, transforming, and representing valid inverse operations in any context, and a set of transformation functions that are capable of preserving undo-related transformation conditions and properties.
A transparent selective undo algorithm for collaborative editing
TLDR
A novel selective undo algorithm T-UNDO (transparent selective undo) is proposed, which can be transparently integrated into the consistency maintenance algorithms of do operations that maintains insertions before deletions in the edit history.
Undoing any operation in collaborative graphics editing systems
TLDR
The Any Undo solution presented in this paper is able to undo any operation in collaborative graphics editing systems and focuses on producing the correct version and the correct number of versions.
A Constraint-based Approach for Generating Transformation Patterns
TLDR
Constraint Satisfaction Problem (CSP) theory is used to devise correct and undoable transformation patterns (w.r.t OT and undo properties) which considerably simplifies the design of collaborative objects.
Using Task Models for Cascading Selective Undo
TLDR
This paper defines a task model for implementing selective undo in the face of dependencies that may exist between the undone action and other subsequent user actions, and presents the selective undo algorithm and discusses extensions that account for differing kinds of inter-action dependencies.
Compensation in Collaborative Editing
TLDR
This paper presents a novel undo approach based on the notion of compensation used in databases where compensating operations semantically undo other operations and is generic in the sense that it can be used in association with any operational transformation algorithm.
Toward Undoing in Composite Web Services
TLDR
This work presents some relevant aspects of the so-called “selective undo” model, and then some hints on how to transpose it into the framework of composite web services.
Using CSP for coordinating undo-based collaborative applications
TLDR
To correctly manipulate undo for a shared object, it is proved that the set of operations of size n • 4 must be totally Commutative, while only a subset of commutative operations is necessary otherwise.
Concurrent Undo Operations in Collaborative Environments Using Operational Transformation
TLDR
This paper aims to highlight two general conditions that need to be satisfied by any transformation adapted to undo, and presents a general undo algorithm based on the definition of a generic undo-fitted transformation, which automatically verifies these conditions.
An empirical evaluation of undo mechanisms
TLDR
This study shows that, for the application studied, when a user is asked to perform undo in the absence of any guidance, the user will tend to gravitate toward an undo mechanism that uses existing dependencies between user actions.
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