Plan-Based Models of Discourse

这个项目的目的是开发一个正式的和可实现的理论，可以发生在人机对话中的交流互动。它将开发一个基于计划的交互模型--明确地表示系统和用户的不同信念，以及他们从对话中产生的共同信念，并将对话中的句子明确地表示为动作-既作为反映直接意图的言语行为，也作为发出对话结构信号的话语行为。我们的目标是开发一种独立于域的对话交互模型，专注于允许系统和用户监控对话理解程度的那些方面。具体地说，目的是说明对话中普遍存在的确认行为，并提供澄清和更正子对话的一般说明。这项工作还将考察计划模式如何影响对话中句子的实际解释，重点是该模式对言语行为解释、时体解释以及一般/具体区分的影响。因此，基于计划的语言方法将更加符合自然对话中明显的实际语言行为。

This project aims to develop a formal and implementable theory of the communicative interactions that can occur within a man- machine dialog. It will develop a plan-based model of the interaction - explicity representing the differing beliefs of the system and the user, as well as their mutually shared beliefs arising from the dialog, and representing the sentences in the dialog explicitly as actions - both as speech acts reflecting immediate intentions, and as discourse acts, signalling the structure of the dialog. The goal is to develop a domain- independent model of dialog interaction, focusing on those aspects that allow the system and user to monitor how well the dialog is understood. In particular, the intent is to account for the prevalent acknowledgement behavior in dialog, and to provide a general account of clarifications and correction subdialogs. The work also will examine how the planning model affects the actual interpretation of the sentences in the dialog, concentrating on the effects the model has on speech act interpretation, and the interpretation of tense and aspect, and the generic/specific distinction. As a result, the plan-based approach to language will be brought into much closer correspondence to the actual linguistic behavior apparent in natural dialogs.