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[MMUSIC] whitespace after 's=' in SDP

Is a whitespace allowed in the s= line of an SDP message?

from ABNF grammar:

session-name-field =  "s=" text CRLF

; generic sub-rules: datatypes
text =                byte-string

byte-string =         1*(%x01-09/%x0B-0C/%x0E-FF)
                      ;any byte except NUL, CR or LF

The space is %x20 so it can be included in any byte-string.
Byte-sting 's= Some Text" should be valid.

But the draft also mentions that "Whitespace MUST NOT be used either side of the `='
sign"

So, is the grammar wrong? or is s= an exception? Are there any other exceptions?

Regards,
Hisham

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