Re: ISSUE-2: What is the mime type of a media fragment? What is its relation with its parent resource?

At 16:06  +0100 27/01/09, Raphaël Troncy wrote:
>Dear Dave,
>
>>But this gets semantically tricky if there is 
>>sound;  what is the correct representation of a 
>>point in time of a sound track?  It's not right 
>>to drop it from the fragment (oof, we'd need 
>>media-type rules for what types get dropped and 
>>what don't).
>>
>>This is steering me towards wondering if a 
>>piece of X, in time, necessarily has some 
>>extension in time, i.e. a time-point is not a 
>>fragment (can you see a zero-width character if 
>>you meet one in the street?).
>
>Hum, does it mean we should put some 
>restrictions in defining media fragments and in 
>particular forbid to request spatio-temporal 
>points? That is, for the temporal dimension, 
>only non-empty interval can be requested, and 
>for the the spatial dimension, only non-empty 
>bounding box can be requested? Can you think of 
>other restrictions?
>Best regards.

that is indeed my wonder.  "please give me the 
fragment of this image at this point" makes as 
little sense, indeed.
-- 
David Singer
Multimedia Standards, Apple Inc.