A trading partner connection is the combination of a document sent or received from a given trading partner.  For example, an 810 Out to Walmart is one trading partner connection.  An additional 810 Out to Lowes would make it two trading partner connection....

The Lite version is used for any Grey Wolf application (like Altitude, Partner Connect, etc).  The Full version is used for applications that are third party or custom in-house applications.   Basically, you will need the Full Version for anything but Grey Wolf applications....

Partner Connect integrates with your ERP thru the Grey Wolf Connector.  You will need the Lite version of the Connector....