About: http://webisa.webdatacommons.org/30729797

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	Boundary key data, as the term is usually employed in the switcher art, refers to data for defining the presence or absence of image information such as would be found, for example, in a video signal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca