This report details the OntoPortal project conducted for the Defence Evaluation and Research Agency (DERA), UK. The specification called for a well-interlinked and incrementally updateable web site detailing the latest research in metadata. The type of information to integrate included information on literature, projects, researchers, organisations, software and standards

A challenge of the semantic web is provision of distributed information with well defined meaning, understandable for di#erent parties. The aim of open hypermedia research has been to support such understanding on hypertext structures since several years. In this paper we show how the semantic web resource description formats can be utilized for automatic generation of hypertext structures from distributed metadata. Ontologies and metadata for three types of resources (domain, user, and observation) are investigated. We investigate a logic-based approach to open hypermedia using TRIPLE, rule-based language for the semantic web.

The World-Wide Web was originally developed as a shared, writable, hypertext medium, a facility that is still widely needed.

The challenge of the semantic web is the provision of distributed information with well defined meaning, understandable for different parties. Particularly, applications should be able to provide individually optimized access to information by taking the individual needs and requirements of the users into account. In this paper we propose a framework for personalized e-Learning in the semantic web and show how the semantic web resource description formats can be utilized for automatic generation of hypertext structures from distributed metadata. Ontologies and metadata for three types of resources (domain, user, and observation) are investigated. We investigate a logic-based approach to educational hypermedia using TRIPLE, a rule and query language for the semantic web. keywords: Educational hypermedia, Semantic web, Ontologies, Adaptive hypermedia, Reasoning on the semantic web.

Abstract. In this paper we propose a framework for the creation of adaptive portal solutions for the Semantic Web. It supports different target domains in a single portal instance. We propose a platform environment where the ontology models and adaptivity are among first-class features. Adaptivity is supported by the personalized presentation layer that integrates software tools for automatic user characteristic acquisition. A significant contribution of the design lies in our method for automatic form building from the domain ontology and automated CRUD pattern support by object-ontology mapping. We evaluate the framework in two domains – online labor market and scientific publications. 1

Abstract. The use of ontologies has an increasing tendency in new webbased application development. Although the ontological repositories offer APIs, a more convenient way is a use of objects which handle data. To take the advantage of the use of objects in the application with the ontological domain model, it is necessary to perform the mapping between ontological instances and objects. In this paper we present an approach dealing with the automatic creation of the class model (in the sense of object-oriented paradigm), which handles data. We also discuss two approaches of mapping between ontological instances and objects. Our approach is evaluated in two domains – online labor market and scientific publications within a portal offering information based on particular domain. 1

Ontologies provide a powerful tool for distributed agentbased information systems. However, in their raw form they can be difficult for users to interact with directly. Different query architectures use structured query languages as an interface but these still require the users to have an expert understanding of the underlying ontologies. By using an Open Hypermedia model as an interface to an ontological information space, users can interact with such a system using familiar browsing and navigation techniques, which are translated into queries over the underlying information. Coupled with dynamic document generation, this allows complicated queries to be made without the user having to interact directly with the ontologies. Our key contribution is a notion of hypermedia links between concepts and queries within an ontological information space. This approach is demonstrated with a Dynamic CV application built around the SoFAR agent framework and the Fundamental Open Hypermedia Model (FOHM). In addition to abstracting the interface, Open Hypermedia allows alternative linkbases to be used to represent different "query recipes", providing different views and navigational experiences to the user. KEYWORDS: Ontological Information Spaces, Fundamental Open Hypermedia Model (FOHM), Agent Based Systems.

FACULTY OF ENGINEERING ELECTRONICS AND COMPUTER SCIENCE DEPARTMENT An Annotative Approach to Better Hyperauthoring and Associative Linking by Timothy J. Miles-Board Early hypertext visionaries proposed entire online archives of the world's literature, with everything associatively linked to everything else. Today, the most widespread hypertext system is the World-Wide Web (WWW), a publicly accessible and glob- ally distributed medium. However, the WWW is not living up to the promise of hypertext associativity - the majority of hypertext linking on the WWW is estimated to be intended for navigational purposes only.

The World Wide Web offers access to a wealth of educational material; yet these are often weakly interlinked and fail to make explicit any real-world relationships. Ontological engineering support has been identified and stressed as one of the key limitations to overcome in building next generation web-based educational systems enabling knowledge sharing and reuse. In this paper we address this important issue by combining the strengths of hypermedia systems with the benefits of ontology-based systems to provide high quality, semantic-enabled web-based educational portals. We present Ontoportal: an ontological hypertext framework for building generic web-based educational portals. We also describe two simple case studies showing how the framework could be used to create ontology-based metadata and generate educational portals semantically interlinking various web-based educational resources (tutorials, assessments, courses, etc) for learning and teaching.

The Semantic Web extends the current state of the Web with well-defined meaning. We advocate the use of ontological hypertext as an application of the Semantic Web to provide a principled and structured approach to navigating the resources on the Web. This paper demonstrates how we have applied this concept to two real-world scenarios.