Titlebook: Extraction and Exploitation of Intensional Knowledge from Heterogeneous Information Sources; Semi-Automatic Appro Domenico Ursino Book 2002

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Extraction and Exploitation of Intensional Knowledge from Heterogeneous Information SourcesSemi-Automatic Appro

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Introductionation Systems and Data Warehouses from sets of pre-existing heterogeneous databases and to highlight the novelty of our contribution to the field of Information Systems. The plan of the chapter is as follows: in the first section we illustrate the motivations which led to the definition of the propo

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Extraction of Synonymies, Homonymies, and Type Conflictsows: first we introduce SD-Graphs, graph-based structures which can be associated to database schemes; then we define a metrics associated to SD-Graphs which allows us to measure the semantic distance existing between objects, which is central to support the derivation of interscheme properties. Aft

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Extraction of Hyponymies and Overlappingss. In particular in the first section we state the problem and present two algorithms for deriving these kinds of properties. The second section describes in full details the first algorithm by (i) presenting the general characteristics of the approach, (ii) illustrating technical details, (iii) des

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