> [!quote] A common term when describing data products, that can be misleading. The code that reads the data usually assumes some kind of structure—i.e., there is an implicit schema, but it is not enforced by the database [20]. A more accurate term is ***schema-on-read*** (the structure of the data is implicit, and only interpreted when the data is read), in contrast with ***schema-on-write*** (the traditional approach of relational database > -  [Designing Data-Intensive Applications (DDIA) — an O’Reilly book by Martin Kleppmann (The Wild Boar Book)](https://dataintensive.net/)