The Eleventh International Workshop on Collaborative Editing Systems

(IWCES 2011)

ACM CSCW 2011, Hangzhou, China

March 20, 2011


Workshop Program


CE systems support a group of geographically dispersed people to edit a shared document (from plain text to a complex format such as rich text, multimedia, or virtual environments etc.) over computer networks, especially the Internet. The major benefits of collaborative editing include reduced task completion time by taking advantage of parallelism and improved solution quality by integrating “wisdom of crowds”. Over the past 20+ years, a large number of CE systems have been developed in academia as effective research vehicles for studying various technical and social issues surrounding CE.

Recent years have witnessed rapid development of novel CE applications that are making impact on industries and end-users, including various collaborative office productivity tools, collaborative software engineering tools, collaborative digital media design tools, and emerging communication and social networking applications. For example, widely accepted systems such as Wikipedia (a free Web-based online encyclopedia) and GIT (a software version control system) have made mass collaborative editing a reality. In particular, Google Wave has triggered a splash of public interests in CE related techniques and in innovatively applying them to a wider spectrum of application spaces, such as social Web, real-time Web, mobile, and virtual world.

The design of CE systems faces various social and technical issues. For example, the impact of culture or organizational roles on CE, melding of synchronous and asynchronous CE in social interaction, privacy and security, consistency maintenance, group undo, group awareness control, interaction control, and syntactic/semantic conflict resolution. Issues such as concurrency control were also studied in traditional areas such as databases and distributed systems. However, CE systems (and groupware in general) demand that we additionally consider human factors when designing concurrency control schemes. Over the years, the CE community has explored numerous novel consistency control techniques such as operational transformation, multi-versioning, and optional locking. A significant attention was given to optimistic approaches especially operational transformation since they allow users to simultaneously edit any part of a shared document at any time without blocking each other.

This workshop builds on the success of previous workshops at Group’99, CSCW’00, Group’01, CSCW’02, ECSCW’03, CSCW’04, GROUP’05, CSCW’06, GROUP’07, and CSCW’08. The main focus has been ad- justed every year according to the organizers’ understanding of research progress and trends in the community. The main focus of the Group’99 workshop was consistency maintenance algorithms. The CSCW’00 workshop included more issues of usability. The Group’01 workshop focused on the people and organizational issues in developing collaborative documents. The CSCW’02 workshop concentrated on usage scenarios of collaborative editing. The main topic of the ECSCW’03 workshop was the integration of collaborative editors into general information or application infrastructure. The focus of the CSCW’04 workshop was the enhancement of familiar existing single-user systems with collaborative editing techniques. The objective of the GROUP’05 workshop was to apply/expand collaborative editing technologies to broader areas/applications. The CSCW’06 workshop focused on how to model operation intentions and maintain semantic consistency in the context of specific group writing tasks. The focus of the GROUP’07 workshop was on Web-based collaborative editing technologies and applications. The CSCW’08 workshop focused on novel CE applications (e.g., collaborative editing applications based on emerging Web technologies, collaborative digital media design tools, collaborative office productivity tools, or collaborative software engineering tools), application-inspired CE technology research, and social impacts of CE applications.

This year’s workshop will focus on innovative applications of CE techniques to emerging platforms/systems, such as smartphone, social Web, real-time Web, and virtual world, in addition to regular topics such as theoretical foundation, algorithm design, and systems/applications development.


We invite submissions addressing issues related to any topics of collaborative editing (systems). Interesting topics include but are not limited to the following:
  1. Innovative applications of CE techniques to emerging platforms/systems
  2. Novel techniques for adapting single-user applications for collaborative use
  3. Concurrency control, consistency maintenance, group undo, group awareness, and conflict resolution
  4. Social impacts of using collaborative editing systems
  5. Human factor and usability studies of CE systems


The goal of this workshop is to bring together researchers from various backgrounds having interest in collaborative editing. We invite contributions from experts in the areas of distributed computing, information systems, human-computer interaction, and social science. Furthermore, we also encourage participation from industry people who really build CE systems and end users who are in need of CE techniques to share their experiences and requirements. While each participant is encouraged to submit a position paper, other participants will be accepted on a space available basis.

Each position paper should contain 2-6 pages summarizing the content for presentation and discussion during the workshop. Papers should be formatted using the standard ACM SIGCHI format and should include an abstract of no more than 150 words. All submissions will be reviewed by the workshop committee and accepted papers will be published online. At least one author is required to present their paper(s) at the workshop. All submissions should be sent to Dr. Haifeng Shen at

Important Dates


Prof. Ning Gu is the Director of Cooperative Information and Systems Laboratory in the School of Information Science and Engineering, Fudan University, China.

Dr. Claudia-Lavinia IGNAT is a researcher at INRIA Nancy- Grand Est in France. She received her Ph.D. degree in 2006 from the Department of Computer Science at ETH Zurich, Switzerland. Her research area is collaborative editing with a focus on consistency maintenance over different types of documents such as textual, graphical and XML documents as well as awareness approaches in collaborative environments.

Dr. Du Li is a Senior Research Scientist at Nokia Research Center, Palo Alto, California. Before he joined Nokia, he received PhD from UCLA in 2000 and had been a profes- sor for seven years. His research interests include mobile computing, Web 2.0, collaborative systems, and computer supported cooperative work. His work concerns the theo- retical foundation of operational transformation as well as the design and optimization of CE systems on the Web 2.0 and mobile phone platforms. He chaired the collaborative editing workshop in CSCW 2000, 2002, 2004, and 2006 and served as an Associate Program Co-Chair in CSCW 2002 and 2006.

Dr. Pascal Molli is an Associate Professor at University of Nancy, France. He is working within the INRIA Project ECOO that stands for Environment and COOperation. He is working on collaborative editing systems and optimistic replication systems.

Dr. Haifeng Shen is a Lecturer in the School of Computer Science, Engineering and Mathematics at Flinders University, Australia. His major research focuses are on Computer Supported Cooperative Work,Human Computer Interaction, Computer Supported Collaborative Learning, Web Computing, Distributed Systems, Software Engineering, Collaborative Virtual Environments, and Information Retrieval. He received his PhD at Griffith University, Australia, in 2003.

David Sun is a PhD student in Computer Science and Electrical Engineering at the University of California, Berkeley. His research interests span computer supported cooperative work, speech interfaces, and signal processing. His work fo- cuses on understanding Operational Transformation’s theo- retical underpinnings as well as making OT a practical tool for collaborative editing system builders.

Dr. Chengzheng Sun is a Professor at Nanyang Technological University, Singapore. Before he moved to Singapore, he was a Professor at Griffith University, Australia. Previously, he worked in Changsha Institute of Technology, University of Amsterdam, Phillips Research Labs Eindhoven, and ACE in Amsterdam, for over 15 years in the areas of distributed and parallel computing systems. His current research lies at the intersections of Computer-Supported Cooperative Work, distributed systems, human-computer interaction, and software engineering. Major applications of his research include collaborative office productivity tools, collaborative computer-aided design and engineering tools, and collaborative virtual environments. Dr. Sun is the leader and chief investigator of REDUCE, CoWord and CoPowerPoint projects.