说明： perl 利用xml-twig 来分析数据的例子，功能很全，是调用xml的最好选择，比xml-sample强多了
(perl use xml-twig to analyze the data examples, function is very wide, is the best choice to call xml, xml-sample than the much easier)
文件列表：
xml-twig
........\a.pl
........\a.pl.bak
........\ex1_1.pl
........\ex1_2.pl
........\ex1_3.pl
........\ex1_4.pl
........\ex1_5.pl
........\ex1_7.pl
........\ex1_9.pl
........\ex2_1.pl
........\ex2_2.pl
........\ex2_3.pl
........\ex2_4.pl
........\ex3_1.pl
........\ex3_2.pl
........\ex3_3.pl
........\ex3_4.pl
........\ex3_5.pl
........\ex3_6.pl
........\ex3_7.pl
........\ex3_8.pl
........\ex4_0.pl
........\ex4_1.pl
........\ex_xmltwig.pl
........\nba.xml
........\nba.xml.bak
........\stats.dtd
........\xml2html1.pl
........\yapc_twig_s1.html
........\yapc_twig_s2.html
........\yapc_twig_s3.html
........\yapc_twig_s4.html
........\yapc_twig_s5.html
........\yapc_twig_s6.html
........\yapc_twig_s7.html
........\yapc_twig_s8.html
........\yapc_twig_s9.html
........\复件 nba.xml
