The ER diagram shown in Figure 11.1 is an example of one of the possible end- products of ER modeling. This model represents the relationships between data described in the requirements specification for the Branch view of the DreamHome case study given in Appendix A. This figure is presented at the start of this chapter to show the reader an example of the type of model that we can build using ER modeling. At this stage, the reader should not be concerned about fully understanding this diagram, as the concepts and notation used in this figure are discussed in detail throughout this chapter.