val to_string : t -> stringval of_string : string -> tval pp_hum : Stdlib.Format.formatter -> t -> unitHttpaf.VersionProtocol Version
HTTP uses a "<major>.<minor>" numbering scheme to indicate versions of the protocol. The protocol version as a whole indicates the sender's conformance with the set of requirements laid out in that version's corresponding specification of HTTP.
See RFC7230§2.6 for more details.