…ion This specification uses the Augmented Backus-Naur Form (ABNF) notation of [ RFC5234 ]. The following core rules are included by reference, as defined in [RFC5234], Appendix B.1 : ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE …

…ntax The file URI syntax is defined here in Augmented Backus-Naur Form (ABNF) [ RFC5234 ], importing the "host" and "path-absolute" rules from [ RFC3986 ] (as updated by [ RFC6874 ]). The generic syntax in [ RFC3986 ] includes "path" and "authority" components, for each of which …

…P [ RFC4566 ] is described by the following Augmented Backus-Naur Form (ABNF) [ RFC5234 ]: mid-attribute = "a=mid:" identification-tag identification-tag = token ; token is defined in RFC 4566 The identification-tag MUST be unique within an SDP session description. 5 . Group Attr…

…d. 3.1.1. Overall View of Syntax The syntax for the image attribute is in ABNF [RFC5234]: image-attr = "imageattr:" PT 1*2( 1*WSP ( "send" / "recv" ) 1*WSP attr-list ) PT = 1*DIGIT / "*" attr-list = ( set *(1*WSP set) ) / "*" ; WSP and DIGIT defined in [RFC5234] set= "[" "x=" xyr…

…n expresses syntax using the Augmented Backus-Naur Form (ABNF) as described in [RFC5234], including the core rules provided in Appendix B of [RFC5234] and the rules provided in [RFC5322]. 3. Implicit TLS Previous standards for the use of email protocols with TLS used the STARTTLS…

…P [ RFC4566 ] is described by the following Augmented Backus-Naur Form (ABNF) [ RFC5234 ]: mid-attribute = "a=mid:" identification-tag identification-tag = token ; token is defined in RFC 4566 The identification-tag MUST be unique within an SDP session description. 5 . Group Attr…

…nt line. 3.3 . ABNF Format Definition The following ABNF uses the notation of [ RFC5234 ], which also defines CRLF, WSP, DQUOTE, VCHAR, ALPHA, and DIGIT. vcard-entity = 1*vcard vcard = "BEGIN:VCARD" CRLF "VERSION:4.0" CRLF 1*contentline "END:VCARD" CRLF ; A vCard object MUST incl…

… 3.1.1 . Overall View of Syntax The syntax for the image attribute is in ABNF [ RFC5234 ]: image-attr = "imageattr:" PT 1*2( 1*WSP ( "send" / "recv" ) 1*WSP attr-list ) PT = 1*DIGIT / "*" attr-list = ( set *(1*WSP set) ) / "*" ; WSP and DIGIT defined in [ RFC5234 ] set= "[" "x=" …

… expresses syntax using the Augmented Backus-Naur Form (ABNF) as described in [ RFC5234 ], including the core rules provided in Appendix B of [RFC5234] and the rules provided in [ RFC5322 ]. 3 . Implicit TLS Previous standards for the use of email protocols with TLS used the STAR…

…a username is defined as follows, using the Augmented Backus-Naur Form (ABNF) [ RFC5234 ]. username = userpart *(1*SP userpart) userpart = 1*(idbyte) ; ; an "idbyte" is a byte used to represent a ; UTF-8 encoded Unicode code point that can be ; contained in a string that conforms…

…P [ RFC4566 ] is described by the following Augmented Backus-Naur Form (ABNF) [ RFC5234 ]: mid-attribute = "a=mid:" identification-tag identification-tag = token ; token is defined in RFC 4566 The identification-tag MUST be unique within an SDP session description. 5 . Group Attr…

…n UTF-8 characters can be defined in terms of octets using the following ABNF [ RFC5234 ], taken from [ RFC3629 ]: UTF8-non-ascii = UTF8-2 / UTF8-3 / UTF8-4 UTF8-2 = <Defined in Section 4 of RFC3629 > UTF8-3 = <Defined in Section 4 of RFC3629 > UTF8-4 = <Defined in Section 4 of R…

…ntax The file URI syntax is defined here in Augmented Backus-Naur Form (ABNF) [ RFC5234 ], importing the "host" and "path-absolute" rules from RFC3986 ] (as updated by [ RFC6874 ]). The generic syntax in [ RFC3986 ] includes "path" and "authority" components, for each of which on…

…ssigned TagName values is defined using this Augmented Backus-Naur Form (ABNF) [RFC5234] notation: TagName = FirstCharacter [Character] FirstCharacter = CapitalLetter / DIGIT Character = CapitalLetter / DIGIT / Underscore CapitalLetter = %x41-5A ; "A" to "Z" Underscore = %x5F ; "…

… ]. This specification uses the Augmented Backus-Naur Form (ABNF) notation of [ RFC5234 ]. The following ABNF rules are imported from the normative references [ RFC5234 ], [ RFC3986 ], and [ RFC3987 ]. ALPHA = %x41-5A / %x61-7A ; A-Z / a-z DIGIT = %x30-39 ; 0-9 HEXDIG = DIGIT / "…