Start with GED-145

I am trying to develop an app that gets data and edit in ICM, through application gateway using GED-145 protocol, but i didn't find in the website a document that really explain how to reach for example campaign, skillgroup etc. So i'm lost, and i need to have a tiny example or clear explanation or a link to start the work i'll be very thankful.

The Enterprise Application Gateway protocol (GED-145) provides a mechanism for Intelligent Contact Manager (ICM) or Contact Center Enterprise (CCE) the ability to communicate with an external application using a simple request/response mechanism.

Application Gateway requests are managed from within the ICM/CCE routing script. The call router, under control of the script editor, will be able to make queries of a host, and base subsequent routing decisions on the results obtained.

This could include:

1. Controlling where and how the call is routed.
2. Passing arbitrary data to the site receiving the call (via translation routing).

The Enterprise Application Gateway interface is a TCP/IP socket based protocol.

The complete details are shared on the DevNet site: https://developer.cisco.com/docs/ent-app-gateway/