PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • They allow such relations as <, >, and <> (not equal), which are not easily handled by current optimization methods, as well as such logical operators as AND, OR and NOT. Second, relations such as A1 >= 0, are evaluated by the spreadsheet as strictly satisfied or unsatisfied, whereas an optimization algorithm evaluates constraints within a tolerance.
http://www.w3.org/ns/prov#wasQuotedFrom
  • utexas.edu