Although entities should have an independent existence within an application domain, there can be a weak emtity instance whose existence is dependent on another entity instance (technically called the identifying owner).
Kahit na entidad ay dapat magkaroon ng isang malayang pag-iral sa loob ng isang domain application, maaaring magkaroon ng isang mahina emtity Halimbawa na ang existance ay nakasalalay sa isa pang nilalang Halimbawa (technically tinatawag na ang pagtukoy may-ari).