Modules use data files to load their default data, demonstration data, user interface definitions, and other configurations into the database. For this, we can use both CSV and XML files.
Note
Changes in Odoo12The YAML file format was also supported until Odoo 11, and was removed in Odoo 12. Still, for a usage example, you can look at the l10n_be official module in Odoo 11, and for information on the YAML format, you can visit http://yaml.org/.
CSV files used by modules are exactly the same as those we have seen and used for the import feature. When using them in modules, the filename must match the name of the model to which the data will be loaded. For example, a CSV file loading data into the library.book model must be named library.book.csv.
A common usage of data CSV files is for accessing security definitions that have been loaded into the ir.model.access model. They usually use CSV files in a security/ subdirectory, named ir.model.access.csv.