bearer of at all times
has function at all times
has-f_at
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 all times@en' is: forall(t) exists_at(x,t) -> exists_at(y,t) and 'has function@en(x,y,t)'.
a has_function b at t =Def. b function_of a at t. (axiom label in BFO2 Reference: [070-001])
hasFunctionAt
(iff (hasFunctionAt a b t) (functionOf b a t)) // axiom label in BFO2 CLIF: [070-001]
function