Extending the Representational State Transfer (REST) Architectural Style for Decentralized Systems
Proceedings of the 26th International Conference on Software Engineering
Yoo-Hoo!: building a presence service with XQuery and WSDL
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Restful web services
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A presence service enables the discovery and retrieval of, and subscription to changes in, an end user's context information. RESTful web services are now emerging as a lighter alternative to the so-called Big Web services. This article presents an early feasibility prototype of a RESTful web-services-based architecture. The architecture enables the discovery and retrieval of and subscription to changes in context information, independent of the technologies used in the end users' domains. Concretely, it enables end users with multiple presence accounts (e.g., MSN, Yahoo, Gmail) to publish context information related to the account(s) they are using at any given time. It also enables other end users or applications to retrieve this information by subscribing to any of the multiple accounts of the publisher. The project has demonstrated that RESTful web services are quite suitable for bridging services across technologies and domains. It has also demonstrated that a RESTful web services approach has several advantages over a traditional web services (also known as Big Web services) approach. However, more functionality needs to be added to the prototype before market introduction is contemplated. The lessons learned are discussed and the missing functionalities are identified.