About: http://webisa.webdatacommons.org/25173930

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	where z is a coordinate along an axis parallel to the optical axis, y is a coordinate on an axis perpendicular to both the optical axis and an longitudinal axis, k is a constant, c is a curvature, and F(y) is a variable function.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com