EMA C++ RDM Usage Guide : 2 Domain Model Overview : 2.6 General Enterprise Message API Concepts : 2.6.6 Posting
 
2.6.6 Posting
Posting offers an easy way for an Open Message Model consumer application to publish content to upstream components which can then provide the information. This can be done off-stream using the Login domain or on-stream using any other non-administrative domain. Use PostMsg to post content to the system. A PostMsg can contain any Open Message Model container type as its payload (but this is often an Msg). A provider indicates support for posting via the supportOMMPost Login attribute, as described in Section 3.3.1. For more information on posting, refer to the Enterprise Message API C++ Edition Reference Guide.