Why does webservices in Lotusscript add suffixes to classes?

Below picture show a webservice (wsdl) imported as lotusscript.into Notes 8.5, (looks the same in 8.0.2)

Each class imported from the wsdl file gets a suffix of “_nX”

#1. why is this prefix added and what does it mean to me as a developer when invoking the webservice.

#2. where can I find info about how to call this imported webservices. (as it has changed the default classnames.)

thanks in advance

Thomas

http://www.notessidan.se