The OpenAS2 application enables you to transmit and receive AS2 messages with EDI-X12, EDIFACT, XML, or binary payloads between trading partners.
There is a build.xml in the Server folder to compile and create the jar and build the distribution package The current version is stored in org.openas2.Session.java - this must be updated whenever a new release is set up. The build file will automatically use the value entered there.