Abstract
Human engineering features for enhancing the usability of practical natural language systems are described. Such features include spelling correction, processing of incomplete (elliptical) inputs, interrogation of the underlying language definition through English queries, and an ability for casual users to extend the language accepted by the system through the use of synonyms and paraphrases. All of the features described are incorporated in LIFER, an applications-oriented system for creating natural language interfaces between computer programs and casual users. LIFER’s methods for realizing the more complex human engineering features are presented.
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