Information extraction suffers from its varying targets, heterogeneous structures, and demand-specific schemas. In this paper, we propose a unified text-to-structure generation framework, namely UIE, which can universally model different IE tasks, adaptively generate targeted structures, and collaboratively learn general IE abilities from different knowledge sources. Specifically, UIE uniformly encodes different extraction structures via a structured extraction language, adaptively generates target extractions via a schema-based prompt mechanism - structural schema instructor, and captures the common IE abilities via a large-scale pre-trained text-to-structure model. Experiments show that UIE achieved the state-of-the-art performance on 4 IE tasks, 13 datasets, and on all supervised, low-resource, and few-shot settings for a wide range of entity, relation, event and sentiment extraction tasks and their unification. These results verified the effectiveness, universality, and transferability of UIE.

本文提出了一种名为UIE的统一文本到结构生成框架，可通用地模拟不同的信息提取任务，通过基于模式的指示器机制自适应生成目标结构，并通过大规模的预训练文本到结构模型捕捉共同的信息提取能力。实验结果显示，UIE在四个IE任务、13个数据集和不同的实验条件下实现了最先进的性能，验证了其有效性、通用性和可迁移性。

通用信息提取的统一结构生成