http://www.ibm.com/developerworks/webservices/library/ws-whichwsdl/
http://msdn2.microsoft.com/en-us/library/ms996466.aspx
http://www.informit.com/articles/article.aspx?p=169106&seqNum=5
http://msdn2.microsoft.com/en-us/library/ms996466.aspx
http://www.informit.com/articles/article.aspx?p=169106&seqNum=5