Difference between Domain model and Data model?

1. Domain Model

·         A domain model is generally implemented as an object model within a layer that uses a lower-level layer for persistence and "publishes" an API to a higher-level layer to gain access to the data and behavior of the model.

·         In the Unified Modeling Language (UML), a class diagram is used to represent the domain model.

 2. Data Model

·         Data models define how the logical structure of a database is modeled. Data Models are fundamental entities to introduce abstraction in a DBMS. Data models define how data is connected to each other and how they are processed and stored inside the system.

·    The very first data model could be flat data-models, where all the data used are to be kept in the same plane. Earlier data models were not so scientific, hence they were prone to introduce lots of duplication and update anomalies

[Design Patterns Interview Questions]