A graphical user interface (GUI) tool for maintaining categorization schemes includes a categorization area that displays user-input fields which may be used to define a number of categories and a number of links that form a categorization scheme. The categorization scheme is organized to enable the computer-executed process to categorize the data. The categorization causes the selection of categories that correspond to the data. The selection is made by making a category determination beginning at the top level and proceeding to the children of categories that correspond to the data.