[http://www.ietf.org/internet-drafts/draft-ietf-atompub-protocol-08.txt The Atom Publishing Format (Internet Draft)]

: The Atom Publishing Protocol (APP) is an application-level protocol for publishing and editing Web resources.  The protocol is based on HTTP transport of Atom-formatted representations.  The Atom format is documented in the Atom Syndication Format (RFC4287).

This document should be considered when designing a MachineInterface like the WikiMachineInterfaceStandard, even if it is deviated from, as it is a good example of RESTful recommended best practice.