Data models are the central component of Talend MDM. They only define the master entities you want to manage while master data records themselves are stored in data containers.
For further information about data containers, see Data Containers.
Data models contain entities which are master data objects (or business entities) such as a Person, a Product, an Organization, etc. Each entity is defined by its attributes which are the entity characteristics, for example, for the Person entity, the attributes could be name, date of birth, address, etc.
When creating a data model from Talend Studio, you compartmentalize records and data to create the most efficient data model possible. In addition, you can define the attributes, validation rules, user access rights and relationships of entities mastered by the MDM Hub.
You can also import/export, edit, copy/paste and delete data models.