In both e-business and e-science, we often need to integrate services across distributed, heterogeneous, dynamic “virtual organizations ” formed from the disparate resources within a single enterprise and/or from external resource sharing and service provider relationships. This integration can

The Web is less agent-friendly than we might hope. Most information on the Web is presented in loosely structured natural language text with no agent-readable semantics. HTML annotations structure the display of Web pages, but provide virtually no insight into their content. Thus, the designers

some general issues related to searching and the Semantic Web and outline how an understanding of the semantics of the search terms can be used to provide better results.

The World Wide Web is a large, heterogeneous, distributed collection of documents connected by hypertext links. The most common technology currently used for searching the Web depends on sending information retrieval requests to "index servers" that index as many documents as they can

the communication mechanisms and proposes a more structured approach to heterogeneity, called hierarchical heterogeneity to solve this problem. It proposes a model structure and semantic framework that support this form of heterogeneity, and discusses the issues arising from heterogeneous component interaction

parameters (see Table 1 for their estimated values): . vocabulary size: number of concepts necessary to formalize all descriptions in the repository; . description complexity: average number of concepts for one description; . description heterogeneity: average number of semantic relations in a

Facet browsing has become popular as a user friendly interface to data repositories. We extend facet browsing of Semantic Web data in five ways. First, users are able to select and navigate through facets of resources of any type and to make selections based on properties of other, semantically

, and in their autonomy. Therefore, two problems need to be solved: how to efficiently discover Web services – based on functional and operational requirements – and how to facilitate the interoperability of heterogeneous Web services. In this paper, we present a solution within the context of the emerging Semantic Web

Abstract—The vision of the Semantic Web is to lift the current Web into semantic repositories where heterogeneous data can be queried and different services can be mashed up. Ontology or agreed consensus is the key issue to achieve that. In this paper, we present the EASAIER (Enabling Access

The Context Interchange strategy presents a novel perspective for mediated data access in which semantic conflicts among heterogeneous systems are not identified a priori, but are detected and reconciled by a context mediator through comparison of contexts axioms corresponding to the systems