In this paper, we discuss the use of ontologies to improve knowledge sharing and reuse.
The newly envisioned semantic Web contains as a component what may be called a Web of Trust, consisting of the trust relationships held between its participants. In terms of this, the degree to which participant A believes what is believed by participant B depends on the degree to which A trusts B. This paper presents a formal language with well-defined… (More)
In this paper, we present an argument for designing metadata schemata with design patterns. Design patterns are structured descriptions of solutions to some class of problems, and are used extensively in various stages of object-oriented software engineering. We present a use case of collaborative construction of metadata for a digital library. We explore… (More)
Artificial agents functioning in the Semantic Web are to be capable of getting knowledge from diverse sources. This implies the capability to continuously update their knowledge bases. New stream reasoning concepts make this need even more pressing. Semantic Web ontologies are commonly represented using description logic knowledge bases. We propose an agent… (More)
The Semantic Web  is a vision of a new generation of the WWW that will enable computational agents to process data that have well-defined formal semantics. Agents can use reasoning to infer new information from statements located on different Web sites. Just like the current WWW, the Semantic Web makes no attempt to centralize publishing, effectively… (More)