W3C home > Mailing lists > Public > public-media-annotation@w3.org > March 2011

Re: inconsistencies in the ID3 mapping table

From: Thierry MICHEL <tmichel@w3.org>
Date: Wed, 09 Mar 2011 19:19:17 +0100
Message-ID: <4D77C4A5.1010901@w3.org>
To: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
Pierre-Antoine,

Could you do these updates in the ID3-mapping table at
http://dev.w3.org/2008/video/mediaann/mediaont-1.0/mappings/ID3.htm


If you don't have access; I have attached this  ID3-mapping table
Update it and  send it back to me. I will then upload it if necessary.


Thanks.

Thierry

Le 09/03/2011 18:10, Pierre-Antoine Champin a écrit :
> Hi all,
>
> this is very embarassing just after the 2nd LC, but when implementing
> the ID3-mapping, I noticed some inconsistencies in the ID3 mapping table...
>
> I consider those changes as mostly editorial, though (conceptual typos,
> if you like). There is no real change in the "spirit" of the spec.
>
> pa
>
>
>
> * the referenced version of ID3 is 2.4, but the mapping table makes
> explicit (href's) and implicit references to the 2.3 specification.
> I vote for defining the mapping w.r.t. 2.4, and leave backward
> compatibility problems to ID3 implementations (for example, Mutagen, the
> python library I used, automatically converts 2.3 ID3 to 2.4).
>
> * title:
> ** remove TALB (it also appears under 'collection' - TALB is the title
> of the album of which the file is a track).
> ** change TIT2 to be an *exact* match
> ** remove TOAL (see 'relation' below - TOAL is the title of the original
> track, in the case of a cover).
> ** remove TIT1 (it also appears under 'description')
>
> * language
> ** the link to ISO_639-2 should be
> http://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
> (currently a link to the french version ;)
>
> * creator:
> ** not clear what 'see composer' means; remove it
> ** add TPE1 as an exact match (NB: this is how it is declared in the
> WebM mapping table)
>
> * contributor:
> ** remove the part about "/"-separated values (deprecated in v2.4, which
> supports "real" multiple-values)
> ** remove TPE1 (see 'creator' above)
> ** remove TOPE ("original performer", in case of a cover; does not seem
> to be a proper contributor)
> ** add TCOM, TPE3, TPE4, TEXT, TMCL, TIPL, TENC (NB: the WebM mapping
> table states that TCOM is contributor)
> ** change all 'contributor' match to 'more specific'
>
> * date
> ** remove TDAT, TYER and TRDA (deprecated in v2.4)
> ** add TDEN, TDRC, TDRL, TDTG as 'more specific' matches
>
> * location
> ** not clear how TCOP is related; remove it (or make it clearer)
>
> * description
> ** remove TIT2 as it is now a match for 'title'
>
> * rating
> ** change POPM to 'exact' match (with a specific rating system)
>
> * relation
> ** remove LINK, as it is a link related to another frame (i.e. URL for a
> contributor), *not* to another media resource
> ** we can keep APIC, but I really would not know how to use it as it
> *embeds* the related resource rather than link to it (make a 'data:' URI??)
>
> * collection
> ** change TALB to 'more specific' match
>
> * frameSize
> ** remove TSIZ: it seems to have been deprecated in 2.4
>
> * numTracks
> ** remove TRCK: it is the track number, not the number of track
>
> * policy
> ** remove TOWN: it is the owner/licensee, not the license
>


Received on Wednesday, 9 March 2011 18:19:39 UTC

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