What does domain modeling in Mendix involve?

Domain modeling in Mendix primarily involves defining the structure of application data. This process encompasses creating and managing entities, which represent the different types of data your application will handle. Each entity can have attributes (fields) that store specific data and relationships with other entities that establish how the different data types connect and interact with each other.

Understanding domain modeling is crucial because it serves as the foundation for the application's functionality and behavior. A well-structured domain model ensures that data is organized effectively, leading to better data integrity and more intuitive application logic. This modeling phase is essential before diving into user interfaces or security features, as the underlying data structure dictates how users will interact with the application and how data will be processed.

The other choices focus on aspects like user interface design or security implementation, which, while important for application development, do not pertain to the core concept of domain modeling itself.