Despite the significant progress of large language models (LLMs) in various tasks, they often produce factual errors due to their limited internal knowledge. Retrieval-Augmented Generation (RAG), which enhances LLMs with external knowledge sources, offers a promising solution. However, these methods can be misled by irrelevant paragraphs in retrieved documents. Due to the inherent uncertainty in LLM generation, inputting the entire document may introduce off-topic information, causing the model to deviate from the central topic and affecting the relevance of the generated content. To address these issues, we propose the Retrieve-Plan-Generation (RPG) framework. RPG generates plan tokens to guide subsequent generation in the plan stage. In the answer stage, the model selects relevant fine-grained paragraphs based on the plan and uses them for further answer generation. This plan-answer process is repeated iteratively until completion, enhancing generation relevance by focusing on specific topics. To implement this framework efficiently, we utilize a simple but effective multi-task prompt-tuning method, enabling the existing LLMs to handle both planning and answering. We comprehensively compare RPG with baselines across 5 knowledge-intensive generation tasks, demonstrating the effectiveness of our approach.

提出了Retrieve-Plan-Generation（RPG）框架，通过生成计划令牌指导后续生成，在答案阶段根据计划选择相关的细粒度段落，并将它们用于进一步的答案生成，从而提高生成的相关性。利用简单但有效的多任务提示调优方法实现了该框架，使现有的大型语言模型能够处理计划和答案两个任务。通过在5个知识密集型生成任务上与基准方法进行全面比较，证明了我们的方法的有效性。

检索-规划-生成:面向知识密集 LL M 生成的迭代规划和回答框架