High-Level Server Side Web Scripting in Curry
PADL '01 Proceedings of the Third International Symposium on Practical Aspects of Declarative Languages
WASH/CGI: Server-Side Web Scripting with Sessions and Typed, Compositional Forms
PADL '02 Proceedings of the 4th International Symposium on Practical Aspects of Declarative Languages
A Generic Programming Extension for Clean
IFL '02 Selected Papers from the 13th International Workshop on Implementation of Functional Languages
iTasks: executable specifications of interactive work flow systems for the web
ICFP '07 Proceedings of the 12th ACM SIGPLAN international conference on Functional programming
Declarative Ajax and client side evaluation of workflows using iTasks
Proceedings of the 10th international ACM SIGPLAN conference on Principles and practice of declarative programming
An Introduction to iTasks: Defining Interactive Work Flows for the Web
Central European Functional Programming School
An iTask case study: a conference management system
AFP'08 Proceedings of the 6th international conference on Advanced functional programming
An executable and testable semantics for iTasks
IFL'08 Proceedings of the 20th international conference on Implementation and application of functional languages
iData for the world wide web – programming interconnected web forms
FLOPS'06 Proceedings of the 8th international conference on Functional and Logic Programming
Managing COPD exacerbations with telemedicine
AIME'11 Proceedings of the 13th conference on Artificial intelligence in medicine
iTask as a new paradigm for building GUI applications
IFL'10 Proceedings of the 22nd international conference on Implementation and application of functional languages
Task-oriented programming in a pure functional language
Proceedings of the 14th symposium on Principles and practice of declarative programming
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Workflow management systems (WFMSs) are systems that generate, coordinate and monitor tasks performed by human workers in collaboration with automated (information) systems. The iTask system (iTasks) is a WFMS that uses a combinator language embedded in the pure and lazy functional language Clean for the specification of highly dynamic workflows. iTask workflow specifications are declarative in the sense that they only specify (business) processes and the types of data involved. They abstract from user interface and storage issues, which are handled generically by the workflow engine. Earlier work has focused on the development of the iTask combinator language. The workflow language was implemented as an engine that evaluated task combinator expressions and generated interactive web pages. Although suitable for its original purpose, this architecture has proven to be less so for generating practically usable workflow support systems. In this paper we present a new implementation of the iTask system that implements the combinator library using a service based architecture that exposes the workflow and a user friendly Ajax client. Because user interface issues are outside the scope of workflow specifications, and cannot be specified explicitly, it is crucial that the generic operationalization of the declarative interaction primitives is of adequate quality. We explain the novel generic libraries we have developed for this purpose.