Is NeTEx a database?

No, NeTEx defines an exchange format to exchange data between systems; it does not constrain the internal representation used by a given system to store or process the data, nor require the use of a specific database design. That said, any database supporting NeTEx data will need to have corresponding elements that can be mapped into the elements in the subset of NeTEx supported.

For more information refer to Transmodel for database modelling (