How to use the Knowledge Foundation API

Content

Hi,

 I am just looking for an option of consuming KF API's to integrate with the external application.

Kindly suggest , As these are the web services. I was reading below document but could not understand , where to start with.

http://documentation.custhelp.com/euf/assets/devdocs/august2012/developer/Connect_KFAPI/Default_Left.htm

If anyone has any SOAP request , would be helpful or anykind of description if can provide.

Thanks,

Peeyush