 Metaphysical holism  presupposes a division of a whole into parts. To apply the part/whole distinction here one must address the ontology of quantum field theory. Taking spacetime regions to be the relevant physical objects, one could understand the system/subsystem and part/whole relations in terms of spatiotemporal inclusion. To assess  physical property holism  or  nonseparability  we need to determine the qualitative intrinsic properties and relations pertaining to spacetime regions in quantum field theory.