LIU Ting,LI Wei-gang,ZHANG Yu,LI Sheng
2006, 20(4): 27-34.
Paraphrase is a common phenomenon in natural language which captures core aspects of variability in language. The study of paraphrase is about the synonymy phenomena of phrases or sentences. With the development of foundation technology of natural language processing, research on paraphrase has been recently received growing attention. Currently, paraphrasing technology has been applied in many NLP fields, such as, information retrieval, question answering, information extraction, automatic text summarization, machine translation and text watermark, to improve the performance of these systems. This paper will mainly survey several aspects of paraphrasing technology as followed: paraphrases corpus construction, paraphrases rules extraction, paraphrases generation and paraphrase evaluation. And some of ourwork about paraphrase are also introduced in brief. At the last section, some challenges, together with the future directions of paraphrasing technology are indicated.