Creative Commons

founded on the notion that some people may not want to exercise all of the intellectual property rights the law affords them (works are automatically copyrighted)

define a set of human and machine readable (RDF/XML) public licenses

Attribution.

Non-commercial.

No Derivative Works.

Copyleft.

define a means for describing works (Dublin Core and Creative Commons) in RDF/XML and associating licenses

Current Metadata Specification (comments welcomed)