Web Services (UDDI, WS-Inspection)

Hi Builder community,
This is for JAVA.
I am trying to understand how web services work and what, how to implement web application. I have done some readings but they all talk about it in the high level, nothing technically to the level that I would like to know such as subscribing to a service with a provider and installing the middle tier or how you would point to the service or etc... Anyone out there have using web services. Please explain, I appreciate your help.

Thanks,
Nhan Nguyen