HOWTO Make Your CC-licensed Images Visible to Robots

After last week’sexciting announcement that Google Image searchis now capable of filtering results by usage rights, we realized there is a lot of interest in how creators can signal their work as being CC-licensed to both humans androbots.

Fortunately, CC has a solution for this that is not only a standard,but recommended by theWorld Wide Web Consortium.

Its called theCreative Commons Rights Expression Languageand is part ofthe semantic web. Without getting too technical, ccREL uses a technology calledRDFato express licensing information to machines so that they can deduce the same facts about a work (such as its title, author, and most importantly, its license) that humans can. If you’re interested in the future of the web and structured data, you’ll want to check out our wiki pages onRDFa,ccREL, andour white paper submittedto the W3C. Google has apage explaining RDFaand Yahoo has apage explaining how RDFa is used by Yahoo Search.

The easiest way to signal to both humans and robots that your content is CC licensed is to head over to ourlicense chooser and choose a licenseto put on your own site.

Our license chooser automatically generates the proper ccREL code, so its easy! Don’t forget to fill out the “Additional Information” section. You’ll then get a snippet of XHTML embed that will contain ccREL. Place this near your work (preferably on its same page of the work which also happens to be unique) and you’re all set. If you’re running an entire content community, you can also dynamically generate this markup based on the particular user, title of the work and so on. Check outThingiversefor a excellent example of this functionality.

Are you already using ccREL or RDFa on your website or platform?Let us knowor add it to ourWiki page!