可扩展标记语言(XML)，这里有更多的网站
类别: PHP教程 
中国XML联盟
http://www.xml.org.cn:8188/
CPCW网站
http://netschool.cpcw.com/homepage/outspace/index.htm#XML
XML.com
http://www.xml.com/pub
The XML Software Site
http://www.xmlsoftware.com/
developerWorks：XML：overview
http://www.ibm.com/developer/xml/
MSDN Online XML Developer Center
http://msdn.microsoft.com/xml/default.asp
http://www.xml.org.cn:8188/
CPCW网站
http://netschool.cpcw.com/homepage/outspace/index.htm#XML
XML.com
http://www.xml.com/pub
The XML Software Site
http://www.xmlsoftware.com/
developerWorks：XML：overview
http://www.ibm.com/developer/xml/
MSDN Online XML Developer Center
http://msdn.microsoft.com/xml/default.asp
