how does google recognize creative commons content

Ironically, Google does not include the rel tag in their declaration of their structured data guide as Creative Commons… .. it came up in search and i thought it would be a model for how to declare something creative-commons in a google-friendly way!

Basically you just copy-paste code output by the chooser which will give you the `rel=“license”`` markup:

Clayton found a meta tag for ‘rights’ but doesn’t think anyone’s really using it or looking at it.