A persistent library bundle (PLB) is added as a library of an application. The PLB is automatically downloaded from a central registry and installed in an application directory. The PLB provides an out-of-the-box functionality to the application. The PLB includes a PLB persistence description. The PLB persistence description specifies how runtime data of the PLB has to be persisted. Upon installation of the PLB to the application, the PLB persistence description is copied to an application database directory. The application database directory stores application persistence description and the PLB persistence description. The application persistence description and the PLB persistence description are assigned to a certain database schema.