FIG. 24 is a diagram illustrating a fourth example of exchange of information regarding elements according to an embodiment of the present disclosure. In the example illustrated in FIG. 24, an end user A transmits information regarding a function desired to be realized in the system 10 to the server 1300a using the end user terminal 1100a (S071). For example, the end user A may express the function desired to be realized in a format that is not necessarily associated directly with the constituent elements of the system 10, such as a photo or text. The server 1300a publishes a posting from the end user A to other users including the end user B (S072). The end user B referring to the posting generates a program which can realize the function desired by the end user A, defines the linkage operation of the elements 100 in the system 10, and transmits the program from the end user terminal 1100b to the server 1300a (S073).
