Domain Model Rules
Sample domain model for a health insurance plan.
Domain model rules. Domain behavior business rules. There s the business rules layer. In software engineering a domain model is a conceptual model of the domain definition needed that incorporates both behaviour and data.
Behavior is often hidden in an application it can be in pageload button1 click or often in helper classes like. The inside is the domain model. When an attempt is made to set the value of the field the field would pass the given value and the validation rule to the ivalidator.
There s the iteration layer. The field objects would also have a reference to an ivalidator. Features of a domain model domain classes each domain class denotes a type of object.
In enterprise architect a business domain model is represented as a conceptual class diagram as illustrated by this diagram from the car rental system model from the eaexample model. In ontology engineering a domain model is a formal representation of a knowledge domain with concepts roles datatypes individuals and rules typically grounded in a description logic. The domain entity pattern entities represent domain objects and are primarily defined by their identity continuity and persistence over time and not only by the attributes that comprise them.
In the onion architecture there are three layers. Each instance of the class separately holds a value. Associations an association is a relationship between two or more domain classes.
Everything calls inward because it s an onion. Then there s the domain model layer. The business domain model provides the business vocabulary the terms and facts on which business rules can be modeled.