Title: Message/External-Body Content-ID Access Type
Author(s): E. Levinson.
Status: EXPERIMENTAL
Date: Dec 1995
Length: 5878
When using MIME [MIME] to encapsulate a structured object that consist of many elements, for example an SGML [SGML] document, a single element may occur several times. An encapsulation normally maps each of the structured objects elements to a MIME entity. It is useful to include elements that occur multiple time exactly once. To accomplish that and to preserve the object structure it is desirable to unambiguously refer to another body part of the same message.
The existing MIME Content-Type Message/External-Body access-types allow a MIME entity (body-part) to refer to an object that is not in the message by specifying how to access that object. The Content-ID access method described in this document provides the capability to refer to an object within the message.
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