Dimitrios A. Koutsomitropoulos

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The growing availability of Linked Data and other structured information on the Web does not keep pace with the rich semantic descriptions and conceptual associations that would be necessary for direct deployment of user-tailored services. In contrast, the more complex descriptions become, the harder it is to reason about them. To show the efficacy of a(More)
Information and knowledge retrieval are today some of the main assets of the Semantic Web. However, a notable immaturity still exists, as to what tools, methods and standards may be used to effectively achieve these goals. No matter what approach is actually followed, querying Semantic Web information often requires deep knowledge of the ontological syntax,(More)
Ontologies on the Semantic Web form a basis for representing humanconceivable knowledge in a machine-understandable manner. Ontology development for a specific knowledge domain is however a difficult task, because the produced representation has to be adequately detailed and broad enough at the same time. The CIDOC-CRM is such an ontology, pertaining to(More)
Metadata applications have evolved in time into highly structured “islands of information” about digital resources, often bearing a strong semantic interpretation. Scarcely however are these semantics being communicated in machine readable and understandable ways. At the same time, the process for transforming the implied metadata knowledge into explicit(More)
The current trends for the future evolution of the Web are without doubt the Semantic Web and Web 2.0. A common perception for these two visions is that they are competing. Nevertheless, it becomes more and more obvious that these two concepts are complementary. Towards this perspective, in this work we introduce an application based on a 3-tier(More)
Digital repositories and digital libraries are today among the most common tools for managing and disseminating digital object collections of cultural, educational, and other kinds of content over the Web. However, it is often the case that descriptive information about these assets, known as metadata, are usually semi-structured from a semantics point of(More)
One of the most prominent features that the Semantic Web promises to enable is the discovery of new and implied knowledge from existing information that is scattered over the Internet. However, adding reasoning capabilities to the existing Web infrastructure is by no means a trivial task. Current methods and / or implementations do not seem to be(More)