Abstract: Disclosed are a method, a software product and a system for machine-executable information processing, representing information in a hierarchical data structure consisting of at least two hierarchy levels, where the structural configuration can be modeled by input means and the contents of an element can either: a) be manipulated by input means; or b) be determined by machine-evaluating an expression, which can be manipulated by input means, said expression being able to contain a reference to at least one other element. Preferred embodiments involve separate modeling in an object hierarchy and a class hierarchy, manipulatable parameters for activating different representation modes and operation modes, and involve distributed parallel processing in conjunction with user-controlled and/or machine-controlled interaction. The method serves to create and execute complex information systems without resorting to programming, such systems being used, in particular, for administrative tasks (e.g.

Abstract: Disclosed are a method, a software product and a system for machine-executable information processing, representing information in a hierarchical data structure consisting of at least two hierarchy levels, where the structural configuration can be modeled by input means and the contents of an element can either: a) be manipulated by input means; or b) be determined by machine-evaluating an expression, which can be manipulated by input means, said expression being able to contain a reference to at least one other element. Preferred embodiments involve separate modeling in an object hierarchy and a class hierarchy, manipulatable parameters for activating different representation modes and operation modes, and involve distributed parallel processing in conjunction with user-controlled and/or machine-controlled interaction. The method serves to create and execute complex information systems without resorting to programming, such systems being used, in particular, for administrative tasks (e.g.