SENTENCE RETRIEVAL DEVICE, SENTENCE RETRIEVAL PROGRAM AND SENTENCE RETRIEVAL METHOD

PROBLEM TO BE SOLVED: To retrieve a set of sentences having high coincidence degrees about arrangement of a plurality of sentences and sentence contents with an input case sentence from retrieval target sentences. SOLUTION: A coincidence degree (a sentence coincidence degree) with each of the input case sentences is calculated about each of the retrieval target sentences (S9-S11), a correspondence case sentence is specified in favor of the retrieval target sentence having the high sentence coincident degree between each of the retrieval target sentences and each of the case sentences (S11), a representative retrieval target sentence is selected from the plurality of retrieval target sentences in favor of the retrieval sentence having the high sentence coincident degree with each of the case sentences (S15), and correction is performed in a direction wherein the sentence coincident degree is heightened when the context of the arrangement between the representative retrieval target sentence and the back-and-forth retrieval target sentences wherein arrangement order thereof is present within a back-and-forth range preset to the representative retrieval target sentence coincides with the context of the arrangement between the correspondence case sentence about the representative retrieval target sentence and the correspondence case sentence about the back-and-forth retrieval target sentences, about each of the representative retrieval target sentences (S19). COPYRIGHT: (C)2010,JPO&INPIT