wsdl

 http://sun.cis.scu.edu.tw/~nms9115/articles/delphi/WebServices/WebServices1.htm

https://snippetinfo.net/mobile/media/1827

https://crunchify.com/create-sample-wsdl-in-eclipse-and-generate-client/

https://www.guru99.com/wsdl-web-services-description-language.html

https://www.eclipse.org/webtools/community/education/web/t320/Implementing_a_Simple_Web_Service.pdf

https://medium.com/@ayushi21095/working-with-soap-based-web-service-using-python-8f532195bc6c

# good example

https://blog.csdn.net/jackphang/article/details/8788178