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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". 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 UTC

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