About: http://webisa.webdatacommons.org/342492316

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	It is NOT defined as any cavity or other geometry; it???s only required property is the complete absorption of ANY incident Electro-magnertic radiation.
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com