[cc-metadata] Standardizing JPEG licensing

Christopher Allen ChristopherA at AlacrityManagement.com
Tue Aug 2 04:42:10 EDT 2005


On Monday, August 01, 2005 8:23 AM Nathan R. Yergler <> wrote:
> It seems there are two obvious possiblities for embedding CC license
> information in JPEG files.  First, EXIF contains a "copyright" tag
> which is intended to be populated with a statement such as
> "Copyright, John Smith, 20xx. All rights reserved."  Following the
> example of embedding a license statement in the TCOP field of ID3v2
> for MP3 files, we could embed a standard statement, such as "C 1995
> Example Photographer. Licensed to the public under
> http://creativcommons.org/licenses/by/2.0/ verify at
> http://example.com/licenseinfo".  Work metadata and verification
> information would then be stored in an external file, in this case
> http://example.com/licenseinfo.  This approach has the advantages
> that EXIF manipulation is well understood and a common operation of
> image editting software and sites.  Additionally, other tools may be
> able to display CC license metadata (even if they do not validate or
> populate) simply because they display all available EXIF data. 
> However, the disadvantage is that it requires metadata to be stored
> in an external, secondary file.                

EXIF is very similar to TCOP in MP3, and ICOP in MP2/4, so I lean toward
supporting in audio and video. I do recommend a slight modifier of how the
text should read:

Instead of:

C 1995 Example Photographer. Licensed to the public under
http://creativcommons.org/licenses/by/2.0/ verify at
http://example.com/licenseinfo

C 2005 Example Photographer <email at example.com> -- This work is licensed to
the public under the Creative Commons Attribution-NonCommercial-ShareAlike
License http://creativecommons.org/licenses/by-nc-sa/2.5/ verify at
http://example.com/licenseinfo

-- Christopher Allen

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.. Christopher Allen                              Alacrity Management ..
.. <ChristopherA at AlacrityManagement.com>   1563 Solano Ave Ste 353 ..
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