| SIP_Messages | SIP_URIs | SIP_Headers | SIP_Private_Headers | SIP_Response_Codes | SIP_basic_rules | SIP_common_rules | SDP_Session_Description | SDP_Attributes | RFC723x_HTTP_1.1 | RFC3986_Generic_URI | RFC3987_IRI | RFC5322_IMF | RFC4975_MSRP | draft2326bis_RTSP_2.0 | RFC5234_ABNF_Notation |
RFC 5322 is a revision of RFC 2822, which itself superseded RFC 822. Obsolete syntactic elements, starting with "obs-", must be interpreted by implementations but not generated. Note that RFC 5322's Verified Errata no. 1905, 1908 and 3979 are taken into account.