RTSP

ABNF for RTSP 2.0 – Real Time Streaming Protocol – RFC 7826

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RTSP/2.0 — URIs

ABNF in Section 20.2 of RFC 7826

RTSP-URI =

schemes ":" URI‑rest

RTSP-REQ-URI =

schemes ":" URI‑req‑rest

RTSP-URI-Ref =

RTSP‑URI / RTSP‑Relative

RTSP-REQ-Ref =

RTSP‑REQ‑URI / RTSP‑REQ‑Rel

schemes =

"rtsp" / "rtsps" / scheme

scheme =

URI-rest =

hier‑part [ "?" query ]

URI-req-rest =

hier‑part [ "?" query ]
Note: fragment part not allowed in requests

hier-part =

"//" authority path‑abempty

RTSP-Relative =

relative‑part [ "?" query ]

RTSP-REQ-Rel =

relative‑part [ "?" query ]

relative-part =

"//" authority path‑abempty / path‑absolute / path‑noscheme / path‑empty

authority =

query =

path =

path-abempty  / ; begins with "/" or is empty
path-absolute  / ; begins with "/" but not "//"
path-noscheme  / ; begins with a non-colon segment
path-rootless  / ; begins with a segment
path-empty ; zero characters

path-abempty =

*( "/" segment )

path-absolute =

"/" [ segment‑nz *( "/" segment ) ]

path-noscheme =

segment‑nz‑nc *( "/" segment )

path-rootless =

segment‑nz *( "/" segment )

path-empty =

0<pchar>

segment =

*pchar [ ";" *pchar ]

segment-nz =

( 1*pchar [ ";" *pchar ] ) / ( ";" *pchar )

segment-nz-nc =

( 1*pchar‑nc [ ";" *pchar‑nc ] ) / ( ";" *pchar‑nc )

; non-zero-length segment without any colon ":"
; no parameter (";" delimited) inside path

pchar =

unreserved / pct‑encoded / sub‑delims / ":" / "@"

pchar-nc =

unreserved / pct‑encoded / sub‑delims / "@"

sub-delims =

"!" / "$" / "&" / " ' " / "(" / ")" / "*" / "+" / "," / "="

; sub-delims is different from RFC 3986/3987
; not including ";"