04914590 is referenced by 387 patents.

A hybrid natural language understanding (NLU) system which is particularly designed for processing natural language text. Primary functional components of the NLU system include a preprocessor; a word look-up and morphology module which communicates with a lexicon and a learning module; a syntactic parser which interfaces with an augmented transition network (ATN) grammar; a case frame applier, which converts the syntactic structure into canonical, semantic "case frames"; and a discourse analysis component which integrates explicit and implied information in the text into a conceptual structure which represents its meaning. This structure may be passed on to a knowledge based system, data base, to interested analysts or decision makers, etc. Significant feedback points are provided, e.g., the case frame applier may notify the syntactic parser of a semantically incorrect parse, or the syntactic parser may seek a semantic judgment based on a fragmentary parse. This system incorporates a novel semantic analysis approach based largely on case grammar.

Title
Natural language understanding system
Application Number
7/195237
Publication Number
4914590
Application Date
May 18, 1988
Publication Date
April 3, 1990
Inventor
John C Hermansen
Catharpin
VA, US
Chih King Yang
Rockville
MD, US
Stephen D Post
McLean
VA, US
Robert B Loatman
Vienna
VA, US
Agent
Carl A Forest
Assignee
Emhart
IN, US
IPC
G06K 9/62
G06F 15/18
G06F 15/21
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