PeopleSoft Integration with 3rd Party REST API

I have requirement to post XML from PeopleSoft to 3rd Party REST API.This will be Async API which will return either 200 (success) or 400, 500(no success).

I have few questions to start PeopleSoft and REST API integration.

1) Do we need to use Document Technology to create Request and Response Messages for REST? Is it must for REST API integration?

    Can we do like this with create Rowset/Non-RowSet based XML and assign properties at run time with REST URL and method?

    &sMethod = "POST";

    &msg.IBInfo.ConnectorOverride = True;

    &msg.IBInfo.SyncServiceTimeout = 45;

    &msg.IBInfo.IBConnectorInfo.ConnectorClassName = "HttpTargetConnector";

   &b = &msg.IBInfo.IBConnectorInfo.AddConnectorProperties("sendUncompressed", "Y", %Header);