NATURAL LANGUAGE PROCESSING DEVICE AND NATURAL LANGUAGE PROCESSING METHOD

WIPO Patent Application WO/2018/025317

A1

The purpose of the present invention is to accurately extract, from text, an attribute-value pair for a numerical attribute, which takes a numerical value. This natural language processing device extracts attribute-value pairs from correct text and calculates the validity of association between each attribute and an unknown numerical value on the basis of the distribution of values of the attribute. The calculation of the validity for each attribute is accomplished by determining a distribution most similar to the distribution of values of the attribute in the correct text and then using this determined distribution. When a plurality of attribute values are subjected to this attribute-value validity calculation, relationships between attributes, as well as relationships between attributes and values, are learned from the correct text to determine appropriate pairs.

MORIMOTO YASUTSUGU (JP)
YANASE TOSHIHIKO (JP)
NIWA YOSHIKI (JP)
MIYOSHI TOSHINORI (JP)

PCT/JP2016/072583

February 08, 2018

August 02, 2016

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HITACHI LTD (JP)

G06F17/30

JP2013527958A	2013-07-04
JP2010182165A	2010-08-19
JP2010117797A	2010-05-27
JP2005250682A	2005-09-15

RAYID GHANI ET AL.: "Text Mining for Product Attribute Extraction", SIGKDD EXPLORATIONS NEWSLETTER, vol. 8, no. 1, June 2006 (2006-06-01), pages 41 - 48, XP058283395
KATSUYUKI FUJIHATA ET AL.: "Extraction of Numerical Expressions by Constraints and Default Rules of Dependency Structure", IPSJ SIG NOTES, vol. 2001, no. 86, 11 September 2001 (2001-09-11), pages 119 - 125

TODA Yuji (JP)

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