Maintaining the Core – Service Repository - Applied SOA Patterns on the Oracle Platform - page 353

Thus, the application (or service) acting as a composition initiator (the most common role
of a trading partner is sender) is not required to construct a message container. It can be
done by adapters in the ABCS layer, but all necessary elements for this must be presented
in the Message Header:
• The elements include transactional data, timestamps, the object ID, object
primary key name, and key data. Basic event identification will be provided in a
way an application sender sees it. This will be used for object identification in the
Agnostic Message Container.
• To identify a complex business event and possible service composition associated
with it, information only about an object is not enough. An object exists in the op-
erational environment in conjunction with other objects and in transit from one
state to another. This information is presented in the Message Header as name-
value pairs, as the ID previously described in the object-context relation (See the
Object section).