2LIU Ling, PU Calton, WEI Han. An XML-enabled data extraction toolkit for we sources[ J]. Information System, 2001, 26 (8) : 563-583.
3NEIL Perlin. The X factor: from HTML to XHTML[ C ]//Proceedings of 2006 IEEE International Professional Communication Conference. [ S. 1. ] : Institute of Electrical and Electronics Engineers Inc, 2006: 190-192.
4HU Yan, XUAN Yan-yan. Research on Web information extraction based on XML [ C ] //Proceedings of the Second International Conference on Genetic and Evolutionary Computing. [ S. 1. ] : Inst of Elec and Elec Eng Computer Society, 2008 : 201-204.
5JUSSI Myllymaki. Effective Web data extraction with standard XML technologies [ J]. Computer Networks, 2002, 39 (5): 635 -644.
6RAGHAVAN V V, WANG G S, BOLLMANN P. A critical investigation of recall and precision as measures of retrieval system performance [ J ]. Information Systems, 1989, 7 ( 3 ) : 205- 229.