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The ORB Core is that part of the ORB which provides the basic representation of objects and the communication of requests.
The ORB Core therefore supports the minimum functionality to enable a client to invoke an operation on a server object, with
(some of) the distribution transparencies required by CORBA.
An object request may have implicit attributes which affect the way in which it is communicated - though not the way in which
a client makes the request. These attributes include security, transactional capabilities, recovery, and replication. These
features are provided by “ORB Services,? which will in some ORBs be layered as internal services over the core, or in other
cases be incorporated directly into an ORB’s core. It is an aim of this specification to allow for new ORB Services to be
defined in the future, without the need to modify or enhance this architecture.
Within a single ORB, ORB services required to communicate a request will be implemented and (implicitly) invoked in a private
manner. For interoperability between ORBs, the ORB services used in the ORBs, and the correspondence between them, must be
identified.