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This document is a revision of the public working draft dated 1998-08-19 incorporating suggestions received in review comments and further deliberations of the W3C RDF Model and Syntax Working Group. With the publication of this draft, the RDF Model and Syntax Specification enters "last call." The last call period will end on October 23, 1998. Significant(More)
The Semantic Web should enable greater access not only to content but also to services on the Web. Users and software agents should be able to discover, invoke, compose, and monitor Web resources offering particular services and having particular properties. As part of the DARPA Agent Markup Language program, we have begun to develop an ontology of(More)
In this paper we present DAML-S, a DAML+OIL ontology for describing the properties and capabilities of Web Services. Web Services – Web-accessible programs and devices – are garnering a great deal of interest from industry, and standards are emerging for low-level descriptions of Web Services. DAML-S complements this effort by providing Web Service(More)
Wireless connectivity and widespread diffusion of portable devices offer novel opportunities for users to share resources anywhere and anytime, and to form ad-hoc coalitions. Resource access control is crucial to leverage these ad-hoc collaborations. In pervasive scenarios, however, collaborating entities cannot be predetermined and resource availability(More)
A new architecture for the World Wide Web is emerging, known as the Semantic Web. In broad terms, it encompasses efforts to populate the Web with content which has formal semantics. This will enable automated agents to reason about Web content, and produce an intelligent response to unforeseen situations. We believe that in order to build the Semantic Web,(More)
Context-awareness has been recognized as an important enabler for pervasive computing. Our aim is to provide a thorough survey of the state of the art in context representation and reasoning in the field of pervasive and context-aware computing. The review is organized in sections according to the knowledge representation techniques applied in the work(More)
This draft specification is a work in progress representing the current consensus of the W3C RDF Model and Syntax Working Group. This is a W3C Working Draft for review by W3C members and other interested parties. Publication as a working draft does not imply endorsement by the W3C membership. While the design has stabilized quite a bit since the previous(More)
Software application development is largely centered around various representations of data and representations of the world in which the software operates. Often, while a software system itself is specified in terms of procedures and procedural semantics, the data the system uses and manipulates has declarative semantics; connecting the two is often an ad(More)
Dendritic cells (DC) are professional antigen-presenting cells with a unique capacity to initiate and regulate immune responses. Immature CD1a(+) DC can be cultured from CD14(+) monocytes in the presence of interleukin (IL)-4 and granulocyte macrophage colony-stimulating factor in vitro. Results of this study show that the nonsteroidal anti-estrogens(More)