US 12,299,023 B2
Document retrieval system
Junpei Momo, Sagamihara (JP); and Hiromichi Godo, Isehara (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/766,557
Filed by Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
PCT Filed Oct. 14, 2020, PCT No. PCT/IB2020/059619
§ 371(c)(1), (2) Date Apr. 5, 2022,
PCT Pub. No. WO2021/079230, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-194187 (JP), filed on Oct. 25, 2019.
Prior Publication US 2023/0026321 A1, Jan. 26, 2023
Int. Cl. G06F 16/30 (2019.01); G06F 16/334 (2025.01); G06F 40/268 (2020.01); G06F 40/284 (2020.01)
CPC G06F 16/3347 (2019.01) [G06F 40/268 (2020.01); G06F 40/284 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A non-transitory computer readable storage medium having instructions stored thereon which, when executed by one or more processers, cause the one or more processers to perform operations for document retrieval, the operations comprising:
inputting a first document;
creating a first graph structure from the first document;
storing a second graph structure;
vectorizing the first graph structure and the second graph structure;
comparing the vectorized first graph structure and the vectorized second graph structure to perform document retrieval;
supplying information; and
dividing the first document into a plurality of tokens;
wherein an edge of the first graph structure comprises a label,
wherein the label comprises the plurality of tokens, and
wherein, in a case where the label has an antonym, generating a new graph structure by reversing a direction of the edge of the first graph structure and replacing the label of the edge by the antonym.