| 摘要 |
PROBLEM TO BE SOLVED: To provide an appropriate related word retrieval corresponding to a user's request that at once suppresses a distribution of frequency of a core element and displays/outputs a composite element of low frequency as a word closely related to the retrieval word by setting a core element level and a composite element level, dealing with a numerical expression at the composite element level and using the core element level for a conventional related word at the time of obtaining the related word of the retrieval word from a document. SOLUTION: This device analyses a morpheme of a document and has a core element of a related word of a retrieval word from appearance information, a morphological analysis part 103 with a sorting function of a core/composite element, a related word retrieval part 106 for retrieving the related word by using analyzed morphological information and the core element and word structure information on the composite element and (or) in front contact/rear contact with the composite element. In this case, the device is equipped with a compound word retrieval part 107 for retrieving a compound word by using the morphological information and the composite element and (or) the word structure information. |
