|def: a function is a realizable entity which describes the inherent purpose of an entity
example: the function of a blender is to blend but a blender can be used (role) as a door stopper.
tempdef: The intrinsic purpose of an entity, e.g., the function of the heart is to pump blood. Note that function is distinct from role e.g., input data plays role of the object in a study but does not have a function in that capacity.
defprov: helen causton
rem2: we should take this out (this would cause confusion with biological function and so forth hence moved to deleted class)
rem3: PRS why not keeping it to link out to GO molecular function, keep it as a place holder
rem4: DS: role is more extrinsic, whereas function is intrinsic|