About: http://webisa.webdatacommons.org/100230210

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	David M. Cooke What we need for this is an interval type. 1.80 m should not be stored as '1.80', but as '1.80 +/- 0.005', and operations such as addition and multiplication should propogate the intervals.
http://www.w3.org/ns/prov#wasQuotedFrom	grokbase.com