Re: [MMUSIC] Review of 4566bis

Paul Kyzivat <> Sun, 31 May 2015 17:43 UTC

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Subject: Re: [MMUSIC] Review of 4566bis
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On 5/31/15 9:38 AM, Christer Holmberg wrote:

Good list Christer!

I have comments on a few of your issues:

> Q6_2:
> In some of the sub-sections, it is indicated that a media-level
> attribute value overrides a session-level attribute value. As far as I
> know, that applies to all attributes (that can be present both on the
> session-level and media-level), so there should be a generic statement
> about that.
> This is similar to the comment on the c= line.

I used to think this, but I think there are some exceptions. (But I 
don't offhand remember what they are.)

> Section 6.7:
> ---------------
> Q6-7_1:
> The text says:
>     “If any one of these appears in a media section then it applies for
>     that media section.  If none appear in a media section then the one
>     from session level, if any, applies to that media section.”
> There should be a general statement in the draft about session level
> information applying to the media level.

I wish there could be a general statement, but it is hard, given 
exceptions. Perhaps there could be a general statement with note that it 
can be overridden in particular cases.

But in any case, *this* is different, because it says that the presence 
of any *one* of four different attributes at media level overrides the 
presence of any one of those four at session level.

> Section 6.11:
> -----------------
> The text says that the attribute “specifies the language” of the session
> description.
> There has been some confusion about what that really means, so I think
> it would be good to clarify that it applies to any textual information
> that may be provided within the description.
> It would also be good to explicitly indicate that the attribute is not
> related to languages used in the actual media streams.