A method of constructing a data transformation block includes selecting a first discrete logic visual icon and a second discrete logic visual icon from a logic repository. A combination valid state is established when the first discrete logic visual icon can be combined with the second discrete logic visual icon. The first discrete logic visual icon and the second discrete logic visual icon are combined in response to the combination valid state to form a data transformation block. The data transformation block has a corresponding functional language source code description of the logical operations to be performed by the data transformation block. The data transformation block processes data to form transformed data. The data transformation block may be stored in the logic repository so that others can access it.