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international world wide web conferences | 1998

WWW-based collaboration environments with distributed tool services

Gail E. Kaiser; Stephen E. Dossick; Wenyu Jiang; Jack Jingshuang Yang; Sonny Xi Ye

We have developed an architecture for a general‐purpose framework for hypermedia collaboration environments that support purposeful work by orchestrated teams. The hypermedia represents all plausible multimedia artifacts concerned with the collaborative task(s) at hand that can be placed or generated on‐line, from application‐specific materials (e.g., source code, chip layouts, blueprints) to formal documentation to digital library resources to informal email and chat transcripts. The framework capabilities support both internal (WWW‐style hypertext) and external (non‐WWW open hypertext link server) links among these artifacts, which can be added incrementally as useful connections are discovered; project‐specific intelligent hypermedia search and browsing; automated construction of artifacts and hyperlinks according to the semantics of the group and individual tasks and the overall workflow among the tasks; application of arbitrary tools to the artifacts; and collaborative work for geographically dispersed teams connected by the Internet and/or an intranet/extranet. We also present a general architecture for a WWW‐based distributed tool launching service compatible with our collaboration environment framework. We describe our prototype realization of the framework in OzWeb. It reuses object‐oriented data management for application‐specific hyperbase organization, and workflow enactment and cooperative transactions as built‐in services, which were originally developed for the Oz non‐hypermedia environment. The tool service is implemented by the generic Rivendell component, which has been integrated into OzWeb as an example “foreign” (i.e., add‐on) service. Rivendell could alternatively be employed in a stand‐alone manner. We have several months experience using an OzWeb hypermedia collaboration environment for our own continuing software development work on the system.


international world wide web conferences | 1996

WWW access to legacy client/server applications

Stephen E. Dossick; Gail E. Kaiser

Abstract We describe a method for accessing Client/Server applications from standard World Wide Web browsers. An existing client for the system is modified to perform HTTP Proxy duties. Web browser users simply configure their browsers to use this HTTP Proxy, and can then access the system via specially encoded URLs that the HTTP Proxy intercepts and sends to the legacy server system. An example implementation using the Oz Process Centered Software Development Environment is presented.


international conference on software engineering | 1997

An architecture for WWW-based hypercode environments

Gail E. Kaiser; Stephen E. Dossick; Wenyu Jiang; Jack Jingshuang Yang

A hypercode software engineering environment repre sents all plausible multimedia artifacts concerned with software development and evolution that can be placed or generated on line from source code to formal doc umentation to digital library resources to informal email and chat transcripts A hypercode environ ment supports both internal hypertext and external link server links among these artifacts which can be added incrementally as useful connections are discov ered project speci c hypermedia search and browsing automated construction of artifacts and hyperlinks ac cording the software process application of tools to the artifacts according to the process work ow and collab orative work for geographically dispersed teams We present a general architecture for what we call hyper media subwebs and groupspace services operating on shared subwebs based on World Wide Web technology which could be applied over the Internet or within an intranet We describe our realization in OzWeb


Archive | 1999

A Mobile Agent Approach to Lightweight Process Workflow

Gail E. Kaiser; Adam Stone; Stephen E. Dossick

The Programming Systems Lab at Columbia University has investigated software process modeling and enactment since its inception in the mid-1980s, initially in the Marvel project [1,2]. In the early to mid-90s, we extended to cross-organizational processes operating over the Internet, in Oz [3,4] and OzWeb [5]. That is, Oz enabled the software development team and other stakeholders to be geographically, temporally and/or organizationally dispersed. OzWeb added integration of Web and other external information resources whereas Oz and Marvel had assumed all project materials to be resident in their native objectbases. OzWebs plugin services and tools were accessible via conventional Web browsers, HTTP proxies and Java GUIs, improving dramatically on Marvels and Ozs X11 Windows XView/Motif user interface clients. The successive prototype frameworks we developed and demonstrated were used on a daily basis in-house to maintain, deploy and monitor their own components, APIs and user interfaces.


Proceedings of Software Process 1996 | 1996

A metalinguistic approach to process enactment extensibility

Gail E. Kaiser; Israel Ben-Shaul; Steven S. Popovich; Stephen E. Dossick

We present a model for developing rule based process servers with extensible syntax and semantics. New process enactment directives can be added to the syntax of the process modeling language, in which the process designer may specify specialized behavior for particular tasks or task segments. The process engine is peppered with callbacks to instance specific code in order to implement any new directives and to modify the default enactment behavior and the kind of assistance that the process centered environment provides to process participants. We realized our model in the Amber process server, and describe how we exploited Ambers extensibility to replace Ozs native process engine with Amber and to integrate the result with a mockup of TeamWare.


workshops on enabling technologies infrastracture for collaborative enterprises | 1999

A workgroup model for smart pushing and pulling

C. Kaiser; C. Vaill; Stephen E. Dossick

Our Workgroup Cache system operates as a virtual intranet, introducing a shared cache to members of the same workgroup. Users may be members of multiple workgroups at the same time. Criteria are associated with each workgroup to pull documents from an individual cache to the shared cache, or push from the shared cache to an individual cache. These criteria provide semantics of the the workgroups tasks and interests to reduce latency for its members.


Archive | 1996

Distributed Tool Services via the World Wide Web

Stephen E. Dossick; Gail E. Kaiser; Jack Jingshuang Yang

We present an architecture for a distributed tool service which operates over HTTP the underlying protocol of the World Wide Web This allows unmodi ed Web browsers to request tool executions from the server as well as making integration with existing systems easier We describe Rivendell a prototype implementation of the architecture described


IEEE Internet Computing | 1997

Tool Services for Intranets

Stephen E. Dossick; Gail E. Kaiser

Organizations are increasingly using intranets to provide information services. Standard Web technologies, including the browser-based user interface, are now used inside organizational network boundaries to relay everything from organizational policy to up-to-the-minute series figures. The authors discuss the use of Web-based tool servers and personal tool services


foundations of software engineering | 1999

CHIME: a metadata-based distributed software development environment

Stephen E. Dossick; Gail E. Kaiser


workshops on enabling technologies infrastracture for collaborative enterprises | 1998

Workgroup middleware for distributed projects

Gail E. Kaiser; Stephen E. Dossick

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Israel Ben-Shaul

Technion – Israel Institute of Technology

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