Information Retrieval. Ugochukwu Chimbo EJIKEME. Structured Vs Unstructured Data. Coperate information not stored in the database In General * The structure of the data itself. * The structure of the container that hosts the data.
Ugochukwu Chimbo EJIKEME
Ontologies are hierarchical structures that reﬂect relationships between concepts.
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• Synonyms and homonyms complicate the task of information retrieval. Concept- based querying aims at finding documents containing specified concepts, regardless of the exact words (or language) in which the concept is specified. Ontologies are used to relate concepts using relationships such as is-a or part-of.