tailieunhanh - Báo cáo khoa học: "Taxonomy, Descriptions, and Individuals in Natural Language Understanding"

Semantically clean inheritance of structured descriptions, taxonomic classification of gpneric knowledge, intensional structures for functional roles (including the possibility of multiple fillers), and procedural attachment (with automatic invocation) make it particularly useful in computer-based natural language understanding. We have implemented a prototype natural language system that uses KLONE extensively in several facets of its operation. | Taxonomy Descriptions and Individuals in Natural Language Understanding Ronald J. Brachman Bolt Beranek and Newnan Inc. KLONE Is a general-purpose language for representing Conceptual Information. Several of its prominent features semantically clean Inheritance of structured descriptions taxonomic classification of gpnerlc knowledge Intenslonal structures for functional roles Including the possibility of multiple fillers and procedural attachment with automatic Invocation make It particularly useful In computer-based natural language understanding. We have Implemented a prototype natural language system that uses KLONE extensively In several facets of Its operation. This paper describes the system and points out some of the benefits of using KLONE for representation In natural language processing. Our system is the beneficiary of two kinds of advantage from KLONE. First the taxonomic character of the structured Inheritance net facilitates the processing Involved In analyzing and responding to an utterance. In particular 1 It helps guide parsing by ruling out semantically meaningless paths 2 It provides a general way of organizing and Invoking semantic interpretation rules and 3 it allows algorithmic determination of equivalent sets of entities for certain plan-recognition Inferences. Second CLONE S representational structure captures some of the subtleties of natural language expression. That 13 It provides a general way of representing exactly the quantlflcatlonal import of a sentence without overcommitting the Interpretation to scope or multiplicity not overtly specified. The paper first presents a brief overall description of the natural language system. Then prior to describing how we use CLONE In the system we discuss some of the language s features at a general level. Finally we look In detail at how CLONE affords US the advantages listed above. 1. THE TASK AND THE SYSTEM Generally speaking we want to provide a natural interface to a subsystem that knows how