Data protection rules have been followed in all respects with respect to the database.  If the owner of the database receives data from many sources, whether by purchase or license, it is important to protect their database rights when selecting and matching the database as a compilation (see commentary on database rights). If the owner of the database has also reformatted, reformatted or modified the original source data in a new dataset, z.B. if the average is used between two financial data sources, the resulting new value may be the copyright of the database owner (if initially). Thus, the owner of the database may own copyrights and database rights. If, at best, the data is transmitted intentionally or otherwise to the database owner, reprogramming (and therefore more time and effort) is required and, in the worst case, errors may occur in the service made available to database subscribers. Notification is therefore an important point that needs to be addressed in such an agreement – when the supplier makes changes; the buyer has at least enough time to prepare for it.  The data can be made available to the owner of the database by the data provider in different ways: transmission, download, provided access or any other form of communication. Whatever the type of delivery, the importance lies in its completeness, accuracy and reliability. If the data has not arrived, delayed, incomplete or imprecise, any subscriber in the database may be affected. Therefore, it is recommended that the owner of the database not only have effective data provider support services, indicating response times and priority levels for “fixes,” but that he or she also has a compensation clause in the event of non-delivery, delay of delivery and strict liability for data inaccuracies. Copyright is another important factor.

The data is often proprietary in nature. When it is presented in a database, users and subscribers should be aware that it is copyrighted and to whom it belongs. Copyright protection should also cover the conditions under which subscribers access the database.