chapter  12
14 Pages

A More General Approach to Word Disambiguation

A common approach to the task of word disambiguation in conceptual parsers is to use lexically based disambiguation rules. Examples of parsers in which this approach has been taken are ELI (Riesbeck & Schank, 1976), the Conceptual Analyzer (Birnbaum & Selfridge, 1979), the Word Expert Parser (Small, 1980), and to some extent the Integrated Partial Parser (Lebowitz, 1980). In this approach, disambiguation rules take the form of requests or demons, stored as part of the dictonary definitions of ambiguous words. At least one request or demon is written for each possible meaning of an ambiguous word. A word is disambiguated when one of these requests or demons is executed, thereby choosing its word sense as the meaning of the word in the given context; or when a request activated by a previous word in the sentence is executed, choosing a word sense of the ambiguous word.