This paper introduces the Ninth Dialog System Technology Challenge (DSTC-9). This edition of the DSTC focuses on applying end-to-end dialog technologies for four distinct tasks in dialog systems, namely, 1. Task-oriented dialog Modeling with unstructured knowledge access, 2. Multi-domain task-oriented dialog, 3. Interactive evaluation of dialog, and 4. Situated interactive multi-modal dialog. This paper describes the task definition, provided datasets, baselines and evaluation set-up for each track. We also summarize the results of the submitted systems to highlight the overall trends of the state-of-the-art technologies for the tasks.

介绍了第九届Dialog System Technology Challenge (DSTC-9)，重点介绍使用端到端对话技术的四项任务，包括1. 带有非结构化知识访问的任务导向型对话建模，2. 多领域任务导向型对话，3. 对话的交互式评估，以及4. 位置交互式多模对话。讨论了每个任务的任务定义、基线和评估设置，总结了提交系统的结果，以突出该领域技术的最新趋势。

DSTC9的第九届对话系统技术挑战赛综述