Abstract: A graphical user interface display symbols for actuators and components for selection and creation of a graph by a user. The actuators represent resources of a provider, and the components include, as components of the actuators, technical implementations for interacting with programming interfaces of one or more providers of the resources, wherein the components are implemented as ontological classes that include declarative definitions of properties of the respective component; wherein, in response to selection of a new actuator by the user, the actuator is represented as a node in the graph, and wherein, in response to selection of a new component for an actuator in the graph, contact is made with the resource, and wherein the actuator and/or the components of the graph indicate technical properties of the resources as well as indicate user elements enabling the user to access the resources by means of functionalities of the components.