You use the Databases tool to register an Operational Reference Store so that the MDM Hub can connect to it. Registration of an Operational Reference Store stores the database connection properties in the MDM Hub Master Database.

You use the Databases tool to create a data source for the Operational Reference Store. An Operational Reference Store data source contains a set of properties for the Operational Reference Store. It contains properties such as the location of the database server, the name of the database, the network protocol used to communicate with the server, the database user ID and password.