W3C home > Mailing lists > Public > public-media-annotation@w3.org > May 2009

top tag descriptions, clarifications

From: David Singer <singer@apple.com>
Date: Wed, 20 May 2009 16:01:25 -0700
Message-Id: <p06240894c63a38360ec0@[]>
To: public-media-annotation@w3.org
I have an action to improve the descriptions 

I'm not quite sure what sort of improvement I should be allowed to do, however.

Let's see where I think an improvement might be indicated.

For many tags:
   -- in what language is this expressed?  Are multiple e.g. titles in 
different languages allowed?

   -- for tags like contributor (contribution role), genre etc.: are 
we planning to have a defined set of names, some extension 
capability, or a free-for-all?

For names
   -- do we allow a de-referencable pointer as well as a textual name? 
E.g. are <http://www.sony.com> and "Sony Corporation" permitted?  How 
do we distinguish the two, if so?

For couplets (contributor, relation):
   -- we need to say how the pairing is done.  Is this textual, e.g. {a, b}?

ma:creator -- is this the 'human names' of the creator(s), or their 
unique IDs (e.g. URN) or  de-referencable pointer (e.g. URI to their 
FaceBook page :-))?

ma:keyword -- if there is more than one word, is it a phrase, or are 
they separate keywords?  Do we need to say phrases are in quotes? 
Are keywords an 'enumerated space' (as above)?

ma:duration -- someone at the meeting was arguing that this might be 
different from the actual media duration, but I can't remember why. 
If it's the actual media duration, it's a property rather than 

ma:spatialDimension -- we need units, and we need to know if they are 
uniform.  I would say that the dimensions must be uniform (square 
grid) and that some unit must be specified (cm, inch, square-pixel, 
point, ...)

ma:genre -- enumeration?  (note typo in the 4th column, 'resrouce')

ma:createDate -- can we say that this is a date as defined in ISO 
8601 string format?  That allows for presentation, comparison, 
conversion to other date systems etc.  We probably don't need to care 
about the b.c.e issue.

ma:compression -- what namespace is used to name compressors?  Or is 
this a URI to the spec.?

ma:location -- probably an ISO 6709 (Annex H) string, right?  Do we 
want other possible additional values here (e.g. a human name, 
"Barcelona") etc.?

ma:collection -- rather than a name, wouldn't an identifier (URN or 
URI) be better?

ma:rating -- how is the person or organization identified?

ma:targetAudience -- isn't this a triplet?  e.g. "Venezuelan Board of 
TV Censors", "Permissible broadcast hours", "03h - 04h"?  Why is 
rating not one of these triples?

David Singer
Multimedia Standards, Apple Inc.
Received on Wednesday, 20 May 2009 23:02:21 UTC

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