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。