Tell about the overall scheme — what objects, what arrays, what is stored?

A data schema is a structure that describes what objects and arrays are stored in the system, and how they are related.

For example, in an online store database, there could be objects:

• User — stores information about customers: name, email, address.
• Order — contains order details: list of products, date, status.
• Product — product description: name, price, stock quantity.

Arrays can be used to store lists, such as an array of products in an order. Overall, the schema reflects business logic and ensures data integrity.