About: http://webisa.webdatacommons.org/146474744

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Some developers such as id software had tools for this in the doom3 days, or CryTek (who document their tangent-space math quite well on the web).
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com