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Re: inconsistencies in the ID3 mapping table

From: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
Date: Thu, 10 Mar 2011 10:59:56 +0100
Message-ID: <4D78A11C.6000503@liris.cnrs.fr>
To: "tmichel@w3.org" <tmichel@w3.org>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
Hi Thierry,

I do not have the rights to commit the changes, so I attach the new version.

I implemented all the changes suggested in my previous mail, with three 
changes:

** moved TIT3 from description to title (I forgot to mention that in my 
previous mail, but I already implemented it in my examples)

** link to ISO 639-2 is to the official page (library of congress) 
instead of wikipedia

** add TMOO as more specific match for 'keyword' (was not present in 
2.3, but is clearly a good match in 2.4)

     pa


On 03/09/2011 07:19 PM, Thierry MICHEL wrote:
> 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 Thursday, 10 March 2011 10:00:30 GMT

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