In the DreamHome case study, a branch office, a member of staff, and a property are
examples of objects that we wish to model. The concept of an object is simple but, at the
same time, very powerful: each object can be defined and maintained independently of the
others. This definition of an object is very similar to the definition of an entity given in Section 11.1.1. However, an object encapsulates both state and behavior; an entity models only state.