RWTH Aachen University
Linked data is not always published with a license. Sometimes a wrong license type is used, like a license for software, or it is not expressed in a standard, machine readable manner. Yet, linked data resources may be subject to intellectual property and database laws, may contain personal data subject to privacy restrictions or may even contain important trade secrets. The proper declaration of which rights are held, waived or licensed is a must for the lawful use of linked data at its different granularity levels, from the simple RDF (Resource Description Framework) statement to a dataset or a mapping.