Pii: S0306-4573(99)00021-7

Pii: S0306-4573(98)00049-1

Constructing and navigating personalised views of the Web

WebClass is a system that allows Web users to create personalised conceptual data which is dynamically merged with original HTML source by a specialised proxy server. This allows groups of users to share \views" of the World Wide Web that include conceptual information such as annotations and subject information. WebClass records paths followed by users during Web exploration. Graph traversal o...

Noetica: A Tool for Semantic Data Modelling

Noetica is a tool for structuring knowledge about concepts and the relationships between them. It diiers from typical information systems in that the knowledge it represents is abstract, highly connected, and includes meta-knowledge (knowledge about knowledge). Noetica represents knowledge using a strongly-typed semantic network. By providing a rich type system it is possible to represent conce...

Experimentation as a way of life: Okapi at TREC

The Okapi system has been used in a series of experiments on the TREC collections, investigating probabilistic models, relevance feedback and query expansion, and interaction issues. The TREC-6 ad hoc task was used to test an application of a new relevance weighting formula, which takes account of documents judged nonrelevant. The application was to a form of blind feedback (using the top-ranke...

Pii: S0306-4573(99)00072-2

Relevance has become a major area of research in the ®eld of Information Retrieval, despite the fact that the concept relevance is not well understood. This paper models manifestations of relevance within a system of relevance attributes to show that the attributes function in di€erent dimensions for the di€erent manifestations of relevance. It is shown that motivational relevance, as a manifes...