Natural language understanding system

专利名称：Natural language understanding system发明人：Robert B. Loatman,Stephen D. Post,Chih-King Yang,John C. Hermansen

申请号：US07/195237申请日：19880518公开号：US04914590A公开日：19900403

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

申请人：EMHART INDUSTRIES, INC.

代理人：Carl A. Forest

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