Domain-independent natural language database interface

Details Domain-independent natural language database interface Domain-independent natural language database interface

G - Physics

06

F

354/229

G06F 17/30 (2006.01)

Patent

CA 1265871

A DOMAIN-INDEPENDENT NATURAL LANGUAGE DATABASE INTERFACE Abstract of the Disclosure A domain-independent natural language interface for an existing entity-relationship database management system. Syntactically, it relies on an augmented phrase structure grammar which retains the convenience and efficiency of a semantic grammar while removing some of its ad hoc nature. More precisely, it is a syntactic domain-independent grammar augmented with semantic variables used by the parser to enforce the semantic correctness of a query; these semantic variables are only instantiated by a domain-dependent lexicon. Semantically, the interpretation of a query is in terms of general database navigation operations applied to domain-dependent parameters obtained from the lexicon. These operations apply to a virtual database, made of the actual database schema augmented with derived entity-sets. Navigation operations are eventually translated to actual database queries. - i -

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