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Feedback on MAWG mappings for XMP

From: Alan Lillich <alillich@adobe.com>
Date: Fri, 5 Mar 2010 11:33:51 -0800
Message-ID: <F9D52555-AAFC-47A3-8E60-FDB5EAD0D8A6@adobe.com>
To: public-media-annotation@w3.org
MAWG members,

I'm a senior developer for XMP at Adobe and want to offer some feedback on the metadata mappings in the March 2010 draft of "Ontology for Media Resource 1.0".

4.2.1.1 Semantic Level Mappings - Mentions xmpDM:copyright.
The presence of xmpDM:copyright was actually a mistake that slipped into the XMP spec. The next XMP spec update will note it as deprecated. It should not be used, dc:rights is the only proper place for a copyright statement in XMP.

If I read the 4.1.2 core properties table correctly, the ma:copyright item has 2 fields, copyright and identifier. Also the ma:policy item has 3 fields, policy, type, and identifier. Given that, the XMP mappings in 4.2.2 table 1 might better be noted as:
   ma:copyright/copyright  =>  dc:rights (not xmpDM:copyright)

There is also in XMP xmpRights:WebStatement, a URL to licensing terms. (The intention of dc:rights is a copyright notice.) It seems like xmpRights:WebStatement might be mapped to ma:policy/identifier.

Since you map ma:genre to ID3's TCON, it would be appropriate to map it to xmpDM:genre in XMP.

Following from above, the mapping for ma:rating would be more accurate as:
   ma:rating/value  =>  xmp:Rating
   ma:rating/min == -1 (note that the XMP range is formally -1 and [0..5])
   ma:rating/max == 5

The mapping of ma:location to xmpDM:shotLocation might be misleading, the use of xmpDM:shotLocation is intended to be script-ish terms, e.g. "interior kitchen daylight".
   ma:location/name could be mapped to xmpDM:shotLocation
   ma:location/latitude /longitude and /altitude could be mapped to the exif:GPS... items in XMP.

hope this helps,
Alan Lillich
Adobe Systems
Received on Monday, 8 March 2010 13:24:12 GMT

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