A license is the specification of a bundle of rights that determines the type of activity or access offered by the gr:BusinessEntity on the gr:ProductOrService through the gr:Offering.
Licenses can be standardized (e.g. LPGL, Creative Commons, ...), vendor-specific, or individually defined for a single offer or product. Whether there is a fee for obtaining the license is specified using the gr:UnitPriceSpecification attached to the gr:Offering. Use foaf:page for linking to a document containing the license, e.g. in PDF or HTML.