2.2 Message Syntax
Except as specified in section 2.2.1, the syntax used for specifying MIME Multipart/Related XOP packaging is as specified in [XML-XOP] section 3, [XML-XOP] section 4.1, and [RFC2387].
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Except as specified in section 2.2.1, the syntax used for specifying MIME Multipart/Related XOP packaging is as specified in [XML-XOP] section 3, [XML-XOP] section 4.1, and [RFC2387].