Sending and Receiving IDOC from SAP to Non SAP system

Hi Experts,

I want to send an IDOC from SAP to non SAP system and i want to receive the IDOC from Non SAP system.

now i am doing the ALE configuration through SALE.

i have completed :

1) Creating a logical system for SAP and Non SAP system

2) Assigning logical system to client for SAP system

3) create RFC destination to non SAP system

4) Define port and asssign to RFC destination

now when i go to generate partner profile : do i need to define two partner profiles?

if yes ,which partener type i should choose for SAP system and which partener type should i choose for non SAP system ?

Also when i create a distribution model view : do i need to create two new distribution model view ( one containing all the message type those are to be outbounded from SAP and other containing all the message types those are to be inbounded to SAP )?

can ou please clarify the fundamentals of partner profile and distribution model view.

Thanks in advance.

Ashish