A method and an apparatus that execute executable codes to install a persistent object from a storage into an application server to access remote services in an EIS are described. The executable codes are based on relational properties for mapping an API (Application Programming Interface) function of an EIS to an object of a cross-platform connection framework coupling the EIS with the application server. The application server is enabled to access the API function of the EIS via the persistent object as part of the cross-platform connection framework.