Python自然语言处理学习笔记(67):7.8 扩展阅读

7.8   Further Reading

Extra materials for this chapter are posted at http://www.nltk.org/, including links to freely available resources on the web. For more examples of chunking with NLTK, please see the Chunking HOWTO at http://www.nltk.org/howto.

The popularity of chunking is due in great part to pioneering work by Abney e.g., (Church, Young, & Bloothooft, 1996). Abney's Cass chunker is described in http://www.vinartus.net/spa/97a.pdf.

The word chink initially meant a sequence of stopwords, according to a 1975 paper by Ross and Tukey (Church, Young, & Bloothooft, 1996).

The IOB format (or sometimes BIO Format) was developed for NP chunking by (Ramshaw & Marcus, 1995), and was used for the shared NP bracketing task run by the Conference on Natural Language Learning (CoNLL) in 1999. The same format was adopted by CoNLL 2000 for annotating a section of Wall Street Journal text as part of a shared task on NP chunking.

Section 13.5 of (Jurafsky & Martin, 2008) contains a discussion of chunking. Chapter 22 covers information extraction, including named entity recognition. For information about text mining in biology and medicine, see (Ananiadou & McNaught, 2006).

posted @ 2012-02-09 20:07 牛皮糖NewPtone 阅读(...) 评论(...) 编辑 收藏