BW Web Service J2EE Engine

Hello,

Please can anyone tell me,

1. if the J2EE Engine must be installed to send XML data to BW using the HTTP port provided under the WAS soap service?

I am new working with XML data for BW and we do not have the engine installed. I have followed the 'How to send XML data to BW' but it is not clear on my question. We are using BW 3.5.

Thank you for any advise