Re: [cc-devel] How to XMP-tag an image with a CC licence?

[Andrew Smith]

Thanks, that helped a lot.

To answer my own questions (in case someone else is looking for the same):
* xmpRights:WebStatement has conflicting definitions. This set of wiki 
pages says it should point to a work-specific URL:

https://wiki.creativecommons.org/XMP#Specifying_License_Information
https://wiki.creativecommons.org/WebStatement
https://wiki.creativecommons.org/Embedded_Metadata

but the following documents (including the CC chooser) say no such thing:

https://creativecommons.org/choose/
http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf
XMPSpecificationPart1.pdf

So I will assume that the wiki pages were written before or despite both 
the common and specified rules and will ignore them (should fix them at 
some point). I will use xmpRights:WebStatement to point to an author's 
URL, not necessarily specific to the work.

* dc:rights and cc:AttributionURL will be set to the same as 
xmpRights:WebStatement

* I'll set xmpRights:UsageTerms to a human-readable string though I 
don't really see the point.

* Things can be both in the same and in separate <Description> elements. 
And according to the XMP specification they can just as well be 
attributes as elements. I shiver thinking of what it takes to write a 
proper parser for this horror.

Cheers,

Andrew

On 24/03/15 17:49, Matt Lee wrote:
Hey Andrew,

Thanks for helping out with this part of the puzzle. For those
following along, this work is part of The List app, or rather, some of
the server side processing components.

I generated a license using https://creativecommons.org/choose/ and
chose XMP as my output, I got this:

http://paste.debian.net/plain/163046

<?xpacket begin='' id=''?>
<x:xmpmeta xmlns:x='adobe:ns:meta/'>
   <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
     <rdf:Description rdf:about=''
     xmlns:xapRights='http://ns.adobe.com/xap/1.0/rights/'>
       <xapRights:Marked>True</xapRights:Marked>
     </rdf:Description>
     <rdf:Description rdf:about=''
     xmlns:xapRights='http://ns.adobe.com/xap/1.0/rights/'
     >
       <xapRights:UsageTerms>
<rdf:Alt>
  <rdf:li xml:lang='x-default' >This work is licensed under a &lt;a
rel=&#34;license&#34;
href=&#34;http://creativecommons.org/licenses/by/4.0/&#34;&gt;Creative
Commons Attribution 4.0 International License&lt;/a&gt;.</rdf:li>
  <rdf:li xml:lang='en_US' >This work is licensed under a &lt;a
rel=&#34;license&#34;
href=&#34;http://creativecommons.org/licenses/by/4.0/&#34;&gt;Creative
Commons Attribution 4.0 International License&lt;/a&gt;.</rdf:li>
  <rdf:li xml:lang='en' >This work is licensed under a &lt;a
rel=&#34;license&#34;
href=&#34;http://creativecommons.org/licenses/by/4.0/&#34;&gt;Creative
Commons Attribution 4.0 International License&lt;/a&gt;.</rdf:li>
  </rdf:Alt>
       </xapRights:UsageTerms>
     </rdf:Description>
     <rdf:Description rdf:about=''
     xmlns:dc='http://purl.org/dc/elements/1.1/'>
       <dc:title>
<rdf:Alt>
  <rdf:li xml:lang='x-default'>Photo of a cat</rdf:li>
  <rdf:li xml:lang='en_US'>Photo of a cat</rdf:li>
</rdf:Alt>
       </dc:title>
     </rdf:Description>
     <rdf:Description rdf:about=''
       xmlns:cc='http://creativecommons.org/ns#'>
       <cc:license rdf:resource='http://creativecommons.org/licenses/by/4.0/'/>
     </rdf:Description>
     <rdf:Description rdf:about=''
       xmlns:cc='http://creativecommons.org/ns#'>
       <cc:attributionName>Matt Lee</cc:attributionName>
     </rdf:Description>

   </rdf:RDF>
</x:xmpmeta>
<?xpacket end='r'?>

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