[MMUSIC] draft-ejzak-mmusic-data-channel-sdpneg - "label" optional in a=dcmap?

[Juergen Stoetzer-Bradler <[e-mail]>]

Hi,

The ABNF rules in draft-ejzak-mmusic-data-channel-sdpneg-02's section  5.1.1.1 allow the "label" 
parameter to _not_ being present in a=dcmap attribute lines.
However, the "label" related description in section 5.1.1.2 says: "...Label is a mandatory 
parameter. ...".

Recent CLUE related discussions indicate that there may be use cases, where applications may not 
need to convey data channel label values in draft-ejzak-mmusic-data-channel-sdpneg based SDP offers 
or answers.

Therefore we would propose to actually make the "label" parameter optional in a=dcmap attribute 
lines and to replace section 5.1.1.2's sentence "Label is a mandatory parameter" with

     "Label is an optional parameter. If the label parameter is not present, then its value defaults 
to the empty string.

Note: The empty string may also be explicitly used as "label" value, such that label="" is 
equivalent to the "label" parameter not being present at all.
[I-D.ietf-rtcweb-data-protocol] allows the DATA_CHANNEL_OPEN message's "Label" value to be an empty 
string."

Would this be agreeable?

Thanks,
Juergen
JSB_email_signature