Final answer:
A data repository meta model is used to determine how information is stored in the repository, how well data integrity can be maintained, and how easily the existing model can be extended.
Step-by-step explanation:
A data repository meta model is used to determine how information is stored in the repository, how well data integrity can be maintained, and how easily the existing model can be extended.
The purpose of a data repository meta model is to provide a structure and set of rules for organizing and storing data in a repository.
Additionally, the meta model helps ensure that data integrity is maintained by specifying constraints and relationships between data elements. Lastly, the meta model allows for easy extensibility, meaning that new data elements and relationships can be added to the model without major disruptions to the existing structure.
Therefore, the correct option is 4) All of the above.