The massive digital resources contain rich, valuable knowledge, and how to use these knowledge effectively and solve the contradiction between the overload of information and the lack of knowledge, has become the focus of academic research. Firstly, this paper discussed the meaning of knowledge extraction, and then conducted an investigation and analysis of the domestic and foreign related research status from the two aspects of implementation method and technology of knowledge extraction, and practice in knowledge extraction. And we think that the future research of knowledge extraction will focus on the study with the scientific literature as the main research object, the study of knowledge extraction technique based on ontology and the semantic model, to construct the adaptive and transplantation knowledge extraction system based on users’needs.%海量的数字资源蕴含着丰富、有价值的知识，如何有效地利用这些知识，解决信息过载而知识匮乏的矛盾成为学术界研究的重点。本文首先探讨了知识抽取的意义，然后从知识抽取实现方法和技术、知识抽取应用实践两个方面对国内外相关研究现状进行了调研和梳理，认为知识抽取未来的研究重点是以科学文献为主要研究对象、基于本体和语义模型的知识抽取技术的研究，构建以用户需求为中心、自适应、可移植的知识抽取系统三个方面。
展开▼
