The Content-Version entity-header field defines the version tag associated with a rendition of an evolving entity. Together with the Derived-From field described in section 188.8.131.52, it allows a group of people to work simultaneously on the creation of a work as an iterative process. The field should be used to allow evolution of a particular work along a single path rather than derived works or renditions in different representations.
Content-Version = "Content-Version" ":" quoted-string
Examples of the Content-Version field include:
Content-Version: "2.1.2" Content-Version: "Fred 19950116-12:26:48" Content-Version: "2.5a4-omega7"