In this chapter, we will cover the following topics:

• Defining the Model representation and order
• Adding data fields to a Model
• Using a float field with configurable precision
• Adding a monetary field to a Model
• Adding relational fields to a Model
• Adding a hierarchy to a Model
• Adding constraint validations to a Model
• Adding computed fields to a Model
• Exposing related fields stored in other models
• Adding dynamic relations using Reference fields
• Adding features to a Model using inheritance
• Using abstract Models for reusable Model features
• Using delegation inheritance to copy features to another Model