One of the most useful articles about WS, ever
Check THIS out, definitely. Recommended.
https://msdn.microsoft.com/webservices/default.aspx?pull=/library/en-us/dnwebsrv/html/wsoverview.asp
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Check THIS out, definitely. Recommended.
https://msdn.microsoft.com/webservices/default.aspx?pull=/library/en-us/dnwebsrv/html/wsoverview.asp