否定与不确定信息抽取研究综述

否定与不确定表达在自然语言中广泛存在,正确识别此类信息并将其与准确信息分开处理,在信息抽取、情感分析、文本挖掘等自然语言处理任务中具有重要研究价值。自从2008年BioScope语料库发布以来,针对否定与不确定信息抽取研究举办了多次大规模评测会议和学术论坛,为采集语料、明确任务及性能评测等提供了交流平台,否定与不确定信息抽取逐渐成为自然语言处理领域的研究热点。该文简要介绍了否定与不确定信息抽取的研究背景、任务定义、相关语料等,并通过回顾和分析该领域的研究现状,展望未来的发展趋势。

Negation and Speculation Extraction: An Overview

Negation and speculation expressions exist extensively in natural language. Identifying and separating them from the reliable information have important value for many natural language processing tasks, such as information extraction, sentiment analysis, and text mining. Since the release of BioScope corpus in 2008, several large-scale evaluation conferences and workshops provided platforms for scholars to collect corpora, define tasks, and perform evaluations. Negation and speculation information extraction has gradually become a hot topic in nature language processing in recent years. This survey mainly introduces the research background, task definition, and corpora for negation and speculation information extraction. In addition, this paper also reviews and analyzes the present researches, and outline its developing trends.