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This article presents a number of ways in which ontologies—schematic descriptions of the contents of domain knowledge—can be constructed and can be used to improve the knowledge engineering process. The main message is that early in the knowledge engineering process an application-specific ontology should be constructed . To facilitate this , the article(More)
his discovery does not work. His helio-centric view allowed him to think that the sun, so near to the center of the planetary system, and so large, must somehow cause the planets to move as they do. In addition to this strong conjecture , he also had to generalize his findings for Mars to all planets by assuming that the same physical conditions could be(More)
This paper presents an overview of the work in progress at the W3C to produce a standard conversion of WordNet to the RDF/OWL representation language in use in the Semantic Web community. Such a standard representation is useful to provide application developers a high-quality resource and to promote interoperability. Important requirements in this(More)
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. Abstract. Problem-solving methods provide reusable architectures and components for implementing the reasoning part(More)
In order to resolve the mismatch between user needs and current image retrieval techniques, we conducted a study to get more information about what users look for in images. First, we developed a framework for the classification of image descriptions by users, based on various classification methods from the literature. The classification framework(More)
In this paper we discuss a tool for semantic annotation and search in a collection of art images. Multiple existing on-tologies are used to support this process, including the Art and Architecture Thesaurus, WordNet, ULAN and Icon-class. We discuss knowledge-engineering aspect such as the annotation structure and links between the ontologies. The annotation(More)
—In this paper, we propose an automatic video retrieval method based on high-level concept detectors. Research in video analysis has reached the point where over 100 concept detectors can be learned in a generic fashion, albeit with mixed performance. Such a set of detectors is very small still compared to ontologies aiming to capture the full vocabulary a(More)