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sTuples: Semantic Tuple Spaces

Deepali Khushraj, Ora Lassila, Timothy W. Finin
Tuple Spaces offer a coordination infrastructure for communication between autonomous entities by providing a logically shared memory along with data persistence, transactional security as well as temporal and spatial decoupling --- properties that make it desirable in distributed systems for e-commerce and pervasive computing applications. In most Tuple Space implementations, tuples are retrieved by employing type-value matching of ordered tuples, object-based polymorphic matching, or XML-style pattern matching. In a heterogeneous environment, this can pose several limitations. This paper discusses the architecture and implementation of a prototype semantic infrastructure, which uses Semantic Web technologies to represent and retrieve tuples from a Tuple Space. Semantic Tuple Spaces (sTuples) overcomes limitations of the JavaSpaces Tuple Space implementation, by making use of a web ontology language and RACER, a description-logic reasoning engine. The sTuples infrastructure extends and integrates with Vigil, a secure framework for communication and access of intelligent services in a pervasive environment. Specialized agents, such as the tuple-recommender agent, task-execution agent and publish-subscribe agent, which have a better understanding of the environment, reside on the Tuple Space and play an important role in providing user-centric reasoning.
1st Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services (MobiQuitous'04), pages 268-277, 22-26 August 2004.
Timothy W. Finin, Chiara Ghidini, Tom La Porta, Chiara Petrioli (eds.), Boston, MA, USA
	Address = {Boston, MA, USA},
	Author = {Khushraj, Deepali and Lassila, Ora and Finin, Timothy W.},
	Booktitle = {1st Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services (MobiQuitous'04)},
	Doi = {10.1109/MOBIQ.2004.1331733},
	Editor = {Finin, Timothy W. and Ghidini, Chiara and La Porta, Tom and Petrioli, Chiara},
	Isbn = {0-7695-2208-4},
	Month = {22--26~} # aug,
	Pages = {268--277},
	Title = {{sTuples}: Semantic Tuple Spaces},
	Url = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1331733},
	Year = 2004}