XMP

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Revision as of 04:18, 17 October 2006 by Mike Linksvayer (talk | contribs) (Note on Visible Copyright Notice in PDFs)
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Creative Commons Metadata and XMP

http://creativecommons.org/images/metadata/xmp_tagline.png


XMP (Extensible Metadata Platform) facilitates embedding metadata in files using a subset of RDF. Most notably XMP supports embedding metadata in PDF and many image formats, though it is designed to support nearly any file type.

Implementations

The Creative Commons licensing process offers a XMP template which may be used to mark files within XMP-supporting Adobe applications (step-by-step how-to document).

PDF

JPEG

Video (various)

  • None yet

Creative Commons is considering recommending XMP as the preferred format for embedded metadata, given its support for numerous file formats and the balkanized state of embedded metadata standards. Others are appearently coming to the same conclusion, e.g., Microsoft has announced support for XMP in Vista applications, see http://blogs.msdn.com/pix/archive/2006/08/23/715340.aspx


Note on Visible Copyright Notice in PDFs

Even when embedded with XMP metadata a licensed PDF document should include a visible copyright notice as described in HOWTO Tag HTML pages.

Note on embedded metadata

This specification conforms with the Nonweb Tagging recommendation.

Specification

XMP defines a rights management schema (see section 4.2.5). Creative Commons sets the following properties (example values):

xapRights:CopyrightThis work is licensed to the public under the Creative Commons Attribution-ShareAlike license http://creativecommons.org/licenses/by-sa/2.0/ verify at http://example.com/pdf-metadata.html (Replace URL following 'verify at' with URL containing metadata about the XMP-embedded file.)

xapRights:MarkedFalse if Public Domain, True otherwise.

xapRights:WebStatementhttp://example.com/pdf-metadata.html (Replace with URL containing metadata about the XMP-embedded file.)

We also set cc:license to maintain a direct reference to the license URL.

cc:licensehttp://creativecommons.org/licenses/by-sa/2.0/ (Replace with relevant license URL.)

Developer Challenges

We have setup some XMP developer challenges to encourage the use of XMP and also to do some research as to what is already supported and what we support.

The XMP logo is either a registered trademark or tradmark of the Adobe Systems Incorporated in the United States and/or other countries.