What does normalization in a domain model refer to?

Normalization in a domain model primarily refers to the process of organizing data to reduce redundancy and dependency. This involves structuring the data in such a way that duplicate data is eliminated, which improves data integrity and efficiency within the database. By removing duplicate data, normalization helps to ensure that each piece of information is stored in one place, making updates and modifications simpler and decreasing the potential for errors.

In the context of a domain model, normalization is crucial as it directly affects how entities and relationships are defined and managed. A well-normalized model promotes better organization, enhances data integrity, and supports the system's scalability and performance. Thus, the essence of normalization aligns closely with the concept of removing duplicate data, as this is one of its primary objectives.