TAILIEUCHUNG - Báo cáo khoa học: "Phrasal Analysis of Long Noun Sequences"

Noun phrases consisting of a sequence of nouns (sometimes referred to as nominal compounds) pose considerable difficulty for language analyzers but are common in many technical domains. The problems are compounded when some of the nouns in the sequence are ambiguously also verbs. The phrasal approach to language analysis, as implemented in PHRAN (PHRasal ANalyzer), has been extended to handle the recognition and partial analysis of such constructions. The phrasal analysis of a noun sequence is performed to an extent sufficient for continued analysis of the sentence in which it appears. PHRAN is currently being used as part of. | Phrasal Analysis of Long Noun Sequences Yigal Arens John J. Granacki and Alice c. Parker University of Southern California Los Angeles CA 90089-0782 ABSTRACT Noun phrases consisting of a sequence of nouns sometimes referred to as nominal compounds pose considerable difficulty for language analyzers but are common in many technical domains. The problems are compounded when some of the nouns in the sequence are ambiguously also verbs. The phrasal approach to language analysis as implemented in PHRAN PHRasal ANalyzer has been extended to handle the recognition and partial analysis of such constructions. The phrasal analysis of a noun sequence is performed to an extent sufficient for continued analysis of the sentence in which it appears. PHRAN is currently being used as part of the SPAN specification ANalysis natural language interface to the use Advanced Design AutoMation system ADAM Granacki et al 1985 . PHRAN-SPAN is an interface for entering and interpreting digital system specifications in which long noun sequences occur often. The extensions to PHRAN s knowledge base to recognize these constructs are described along with the algorithm used to detect and resolve ambiguities which arise in the noun sequences. 1. Introduction In everyday language we routinely encounter noun phrases consisting of an article and a head noun possibly modified by one or more adjectives. Noun-noun pairs e. g. park bench atom bomb and computer programmer are also common. It is rare however to encounter noun phrases consisting of three or more nouns in sequence. Consequently research in natural language analysis has not concentrated on parsing such constructions. The situation in many technical fields is quite different. For example when describing the specifications of electronic systems designers commonly use expressions such as bus request cycle transfer block size segment trap request interrupt vector transfer phase arithmetic register transfer instruction. During design specification

• Báo cáo khoa học
• Phrasal Analysis of Long
• Noun Sequences
• Yigal Arens
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