15 Syntax

15 Syntax

The RTSP syntax is described in an augmented Backus-Naur form (BNF) as used in RFC 2068 [2].

15.1 Base Syntax

OCTET = <any 8-bit sequence of data> CHAR = <any US-ASCII character (octets 0 - 127)> UPALPHA = <any US-ASCII uppercase letter "A".."Z"> LOALPHA = <any US-ASCII lowercase letter "a".."z"> ALPHA = UPALPHA | LOALPHA

DIGIT = <any US-ASCII digit "0".."9"> CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)> CR = <US-ASCII CR, carriage return (13)> LF = <US-ASCII LF, linefeed (10)>

SP = <US-ASCII SP, space (32)> HT = <US-ASCII HT, horizontal-tab (9)> DQUOTE = <US-ASCII double-quote mark (34)> CRLF = CR LF

LWS = [CRLF] 1*( SP | HT ) TEXT = tspecials = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "" | DQUOTE | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT

token = 1* quoted-string = ( DQUOTE *(qdtext) DQUOTE ) qdtext = quoted-pair = "" CHAR

message-header = field-name ":" [ field-value ] CRLF field-name = token field-value = *( field-content | LWS ) field-content = <the OCTETs making up the field-value and consisting of either *TEXT or combinations of token, tspecials, and quoted-string>

safe = "$" | "-" | "_" | "." | "+" extra = "!" | "*" | "'" | "(" | ")" | ","

hex = DIGIT | "A" | "B" | "C" | "D" | "E" | "F" | "a" | "b" | "c" | "d" | "e" | "f" escape = "%" hex hex reserved = ";" | "/" | "?" | ":" | "@" | "&" | "="

unreserved = alpha | digit | safe | extra xchar = unreserved | reserved | escape