A Survey of Implicit Discourse Relation Recognition

A discourse containing one or more sentences describes daily issues and events for people to communicate their thoughts opinions. As are normally consist of multiple text segments, correct understanding the theme a should take into consideration relations in between segments. Although sometimes connective exists raw texts conveying relations, it is often cases that no two segments but some implicit relation does exist them. The task recognition (IDRR) detect classify its sense without connective. Indeed, IDRR important diverse downstream natural language processing tasks, such as summarization, machine translation so on. This article provides comprehensive up-to-date survey task. We first summarize definition data sources widely used field. categorize main solution approaches from viewpoint development history. In each category, we present analyze most representative methods, including origins, ideas, strengths weaknesses. also performance comparisons those solutions experimented on public corpus with standard procedures. Finally, discuss future research directions analysis.