Re: [GMG-Devel] Metadata in MediaGoblin

[Christopher Allan Webber]

Heya Jonas, sorry for the delayed reply.  Things have been busy what
with all the activity with summer internships, etc.

So first of all, caveat, I never really worked much with the XMP stuff
at Creative Commons when I was there, so I can't provide advisement on
details related to that... I only worked on porting that bit when we
moved the chooser over to the new system... that said, the issue you're
trying to address I think has pretty general approaches within the
MediaGoblin codebase and I think it's possible.

Your first step for looking into this should be investigating the plugin
infrastructure:

  http://mediagoblin.readthedocs.org/en/v0.4.1/#part-3-plugin-writer-s-guide

You'd probably want to do this in three parts:
 - Extend the processing code (this is probably about to change a bit
   shortly when the reprocessing branch lands) to handle this as an
   additional processing step.
 - Add additional data to the view context of a particular media
 - Add new views possibly if it's needed

If you jump on IRC, I can point you to relevant points of the code.  You
know how to find me.

Hope that's helpful!
 - Chris

Jonas Öberg writes:

> Greetings,
>
> I'm a previous employee of Creative Commons (where I worked at the
> same time as cwebber) and since March this year I'm working with the
> Shuttleworth Foundation on the concept of embedded metadata for
> digital works. Essentially trying to bring order to how people embed
> license information in EXIF tags and similar structures.
>
> You can watch our introductory video here:
>
> http://vimeopro.com/user18151220/commons-machinery/video/65553018
>
> (yes, it should probably be Mediagoblin-hosted instead :-)
>
> We would like to build a prototype around this with Mediagoblin. We've
> hacked Inkscape to have somewhat better support and UI for license
> metadata, and we'll be building a plugin to Firefox that places
> license metadata on the clip board when someone copies an image from a
> web page, something that can then be picked up by Inkscape.
>
> What we'd love to do is to create a "full cycle re-use" scenario,
> involving Mediagoblin, Firefox and Inkscape. The story goes something
> like this:
>
> 1. An svg is uploaded to a Mediagoblin instance.
> 2. A user uses Firefox (with an add-on to copy metadata) to browse the
> Mediagoblin instance
> 3. The user selects one or more illustrations that the user wants to
> re-use or re-purpose
> 4. The user uses the new function “copy Image with metadata” (pending
> native support in the “copy Image” code) in Firefox and paste in
> Inkscape to copy one or more illustrations.
> 5. The user makes modifications to the illustrations, optionally
> changing the metadata
> 6. The user uploads the finished work to Mediagoblin as a new illustration
>
> What we want should happen:
>
> When the original illustrator uploads the illustration, Mediagoblin
> checks and displays the correct licensing and attribution information
> according to the metadata embedded in the illustration.
>
> This metadata is retained through copy/paste in Firefox and when the
> user uploads a changed illustration, Mediagoblin attributes both
> creators correctly and gives accurate licensing information in both
> text and embedded RDFa as well as making a link to the original image.
>
> Please note that this is not meant to be a finished product! We want
> to create this with Mediagoblin to show what could be done if support
> was in the tools we use.
>
> I'll be digging into Mediagoblin within the next couple of weeks to
> get a better understanding for where in Mediagoblin such support
> should go and how it's best implemented. Any thoughts on this in the
> mean time is obviously well appreciated :-)
>
>
> Sincerely,
> Jonas
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