About: http://webisa.webdatacommons.org/217067914

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	Now, trying to invoke (some other overload) of operator* with, say, operand types C and D for which is_multipliable<C, D>::value is false and mult_traits<C, D>::type is not defined is an error on some compilers.
http://www.w3.org/ns/prov#wasQuotedFrom	boost.org