ABNF for SDP — Generic Rules
RFC 4566 – Section 9, p. 43alpha-numeric =
POS-DIGIT =
%x31-39
; 1-9
decimal-uchar =
DIGIT
/ POS‑DIGIT DIGIT
/ ( "1" 2*( DIGIT ) )
/ ( "2" ( "0" / "1" / "2" / "3" / "4") DIGIT )
/ ( "2" "5" ( "0" / "1" / "2" / "3" / "4" / "5" ) )
/ POS‑DIGIT DIGIT
/ ( "1" 2*( DIGIT ) )
/ ( "2" ( "0" / "1" / "2" / "3" / "4") DIGIT )
/ ( "2" "5" ( "0" / "1" / "2" / "3" / "4" / "5" ) )
text =
byte‑string
; default is to interpret this as UTF8 text
; ISO 8859‑1 requires "a=charset:ISO‑8859‑1" session‑level attribute to be used
; default is to interpret this as UTF8 text
; ISO 8859‑1 requires "a=charset:ISO‑8859‑1" session‑level attribute to be used
byte-string =
1*( %x01‑09 /
%x0B‑0C /
%x0E‑FF )
; any byte except NUL, CR or LF
; any byte except NUL, CR or LF
non-ws-string =
token =
1*( token‑char )
token-char =
%x21 /
%x23‑27 /
%x2A‑2B /
%x2D‑2E /
%x30‑39 /
%x41‑5A /
%x5E‑7E
email-safe =
%x01‑09 /
%x0B‑0C /
%x0E‑27 /
%x2A‑3B /
%x3D /
%x3F‑FF
; any byte except NUL, CR, LF, or the quoting characters ( ) < >
; any byte except NUL, CR, LF, or the quoting characters ( ) < >
integer =