The Document Object Protocol enables representation of an ordinary file, such as a document generated by a word-processing application, in a mail folder for later retrieval. This protocol extends the Message and Attachment Object Protocol, which is described in [MS-OXCMSG].
Sections 1.8, 2, and 3 of this specification are normative and can contain the terms MAY, SHOULD, MUST, MUST NOT, and SHOULD NOT as defined in RFC 2119. Sections 1.5 and 1.9 are also normative but cannot contain those terms. All other sections and examples in this specification are informative.