Abstract: A method for creating and executing a computer workflow using a graphical user interface. A plurality of executable components is defined wherein the executable components are based on an input, an output, metadata and a sub-interpreter. Each of the executable components represents a computer-implemented computational process that is performed on one or more inputs to the executable component and that generates one or more outputs based on a predefined computational algorithm. A graphical user interface is defined that allows a user to visually create the computer workflow on a user display by selecting from a library of said executable components. The user graphically connects one or more input terminals of selected executable components with one or more output terminals of second selected executable components.