RETRIEVAL OF INFORMATION OBJECTS USING A COMBINATION OF CLASSIFIERS ANALYZING LOCAL AND NON-LOCAL SIGNS Russian patent published in 2019 - IPC G06F17/28 

FIELD: computer equipment.

SUBSTANCE: invention relates to computer systems, methods of natural language processing. Technical result is achieved due to extraction by computer system from text in natural language of plurality of features associated with each text segment of plurality of text segments, associating one or more tags with each text segment from a plurality of text segments by processing using the first feature stepped classifier, extracting, from a local context of a token candidate of a text segment from a plurality of text segments, a plurality of features associated with the candidate token, processing, using a second stage classifier, a combination of a plurality of local features and tags associated with text segments, to determine the degree of association of the information object referred to by the candidate token with the category of information objects.

EFFECT: high efficiency and quality of extracting information.

20 cl, 14 dwg