Method and apparatus for learning information extraction pattern

Details Method and apparatus for learning information extraction pattern Method and apparatus for learning information extraction pattern

Filed on

1995-06-06

Date issued

1998-08-18

Examiner

Horabik, Michael

Other Related Categories

395 50, 395 54, 395 75, G06F 1518

Type

Patent

Status

active

Patent number

057969264

Description

ABSTRACT:
A system is provided for learning extraction patterns (grammar) for use in connection with an information extraction system. The learning system learns extraction patterns from examples of texts and events. The patterns can then be used to recognize similar events in other input texts. The learning system builds new extraction patterns by recognizing local syntactic relationships between the sets of constituents within individual sentences that participate in events to be extracted. The learning system generalizes extraction patterns it has learned previously through simple inductive learning of sets of words that can be treated synonymously within the patterns. Sets of patterns for a sample extraction task perform nearly at the level of a hand-built dictionary of patterns.

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