Ontology Based Context Modeling and Reasoning using OWL
PERCOMW '04 Proceedings of the Second IEEE Annual Conference on Pervasive Computing and Communications Workshops
An Architecture Supporting the Development of Collaborative Applications for Mobile Users
WETICE '04 Proceedings of the 13th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises
WildCAT: a generic framework for context-aware applications
MPAC '05 Proceedings of the 3rd international workshop on Middleware for pervasive and ad-hoc computing
A survey on context-aware systems
International Journal of Ad Hoc and Ubiquitous Computing
CARISMA: Context-Aware Reflective mIddleware System for Mobile Applications
IEEE Transactions on Software Engineering
Composite subscriptions in content-based publish/subscribe systems
Proceedings of the ACM/IFIP/USENIX 2005 International Conference on Middleware
A framework for event composition in distributed systems
Proceedings of the ACM/IFIP/USENIX 2003 International Conference on Middleware
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The use of context provision middleware is a promising approach for dealing with the low-level functions involved in handling contextual events when building ubiquitous applications. Several middleware platforms are currently available that provide support for context handling, each one adopting different models for interacting with applications and representing contextual data, and aiming at handling different types of context. There are ubiquitous applications that need dealing with a high degree of heterogeneous context sources and detection of complex event patterns thus requiring support of different and often noninteroperable middleware platforms. For this kind of application, developers must handle the platform heterogeneity, thus increasing the complexity of the application code. To address this issue, we propose OpenCOPI (Open COntext Platform Integration), a context platform that integrates several context provision middleware and provides common services for handling the composition of contextual events in order to offer a unified context platform. This paper introduces OpenCOPI and details its composition event service, CES, showing the integrating of two context middleware. The paper also describes a case study, based on a Meeting Detection System, to illustrate the use of CES.