bearer of at some time
has function at some time
has-f_st
Alan Ruttenberg: This is a binary version of a ternary time-indexed, instance level, relation. The BFO reading of the binary relation 'has function at some time@en' is: exists t, exists_at(x,t) & exists_at(y,t) & 'has function@en'(x,y,t)
(iff (hasFunctionAt a b t) (functionOf b a t)) // axiom label in BFO2 CLIF: [070-001]
a has_function b at t =Def. b function_of a at t. (axiom label in BFO2 Reference: [070-001])
hasFunctionAt
function