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Related word graph creation device, related word graph creation method, related word providing device, related word providing method, and program
Related word graph creation device, related word graph creation method, related word providing device, related word providing method, and program
PROBLEM TO BE SOLVED: To enable a thesaurus defining concept hierarchy to be combined with a topic graph defining relation between words included in a corpus.SOLUTION: A retrieval device 20 comprises: a thesaurus database 231 for storing a thesaurus 11 defining words concept hierarchy; a topic graph database 232 for storing a topic graph 12 defining relation between words included in a corpus; and a category graph database 233 for storing a category graph 13 defining category hierarchy used for directory retrieval. The retrieval device 20 creates a related words graph 10 in a graph structure by combining the thesaurus 11, the category graph 13 and the topic graph 12 so that nodes included in the category graph 13 and nodes included in the thesaurus 11 are linked and also the nodes included in the category graph 13 and nodes included in the topic graph 12 are linked.
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