The Semantic Web: The Roles of XML and RDF
IEEE Internet Computing
The Semantic Web And Its Languages
IEEE Intelligent Systems
Agents handling annotation distribution in a corporate semantic web
Web Intelligence and Agent Systems
An Object-Oriented Approach on Web Information Representation and Derivation
EEE '04 Proceedings of the 2004 IEEE International Conference on e-Technology, e-Commerce and e-Service (EEE'04)
Complex semantic web ontology mapping
Web Intelligence and Agent Systems
Semantic based collaborative P2P in ubiquitous computing
Web Intelligence and Agent Systems
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Based on XML, RDF(S) has been recommended as the basic layer of the Semantic Web, providing a foundation for the higher layers of ontology, logic and trust. Although RDF(S) enables specification and identification of data and relationships between data, it has some limitations as a foundational language of the Semantic Web. Firstly, the unconstrained framework of the RDF Schema makes it hard to share information from different sources. Furthermore, RDF(S) has limited expres-siveness as a vocabulary description language, which is partly due to insufficient object-oriented features. Finally, the unclear semantics of RDF(S), caused by language constructs with dual roles, impede any approach to provide reasoning support for the language. To overcome some of the limitations, this paper presents Layered RDF, a web information representation language based on RDF(S). Layered RDF distinguishes schema information from instance information by having separated layers. Furthermore, Layered RDF provides more powerful schema mechanisms than does RDF Schema, by incorporating object-oriented features such as inheritance and polymorphism.