2.2.4 FastTransfer Stream
The information set encoded in a FastTransfer stream depends on the type and parameters of the operation that produces it, as specified in section 18.104.22.168. Parsing (syntactic analysis) of the stream can be done without knowing what operation produced it.
At a high level, the FastTransfer stream contains serialized mailbox data and markers. Note that markers are not properties and can never have a value, although they are specified in [MS-OXPROPS] and have the same syntax as property tags. The complete list of markers is specified in section 22.214.171.124.4.
Section 126.96.36.199 and section 188.8.131.52 contain an Augmented Backus-Naur Form (ABNF) like description of the tokenized FastTransfer stream structure. The description uses the conventions specified in [RFC5234], except for the following:
For display purposes, indented lines represent a continuation of the lines that precede them.
Despite their name, FastTransfer streams are not represented as Stream objects, and they can only be manipulated by using the RopFastTransferSourceGetBuffer ROP (section 184.108.40.206.1.5) for download operations and RopFastTransferDestinationPutBuffer ROP (section 220.127.116.11.2.2) for upload operations. For more details about how FastTransfer streams are produced and processed by ROPs, see section 18.104.22.168.