Why do we need IDL for CORBA?-2

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The following figure shows a request passing from a client to an object implementation in the CORBA architecture. Both client and object implementation are isolated from the object request broker (ORB) by an IDL interface.

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The client's request is passed to an ORB. If the target object is local, the ORB routes the message to its destination by another IDL interface (called IDL Skeleton). If not, the ORB routes the invocation to a remote ORB. The remote ORB then routes the message to the target object.

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