A streamlined, dynamic definition of a customized user interface that presents content from a variety of service providers or sources can be provided. A server can retrieve a list of underlying business object nodes required for presentation of an organization-specific user interface corresponding to an organization from which a call for an instance of the organization-specific user interface is received at the server. A portal business object that matches a structure of the organization-specific user interface can be created that includes one portal business object node corresponding to each user interface element of a structure of the organization-specific user interface. Access to the portal business object can be provided for a user interface model that creates the organization-specific user interface by calling the underlying business object nodes according to the portal business object. Related articles, systems, and the like are disclosed as well.