There is a set of standard text input files which are created and controlled by the MDX Version 6 interface. These files can be directly edited from within the MDX Version 6 interface by right clicking on the window when one of these is displayed. It is essential that such direct editing of input files be done very carefully in order to maintain the integrity of the project input. Direct editing is not the recommended approach for general use, but can be useful at times. Recently added features and some seldom-used features can only be accessed through direct editing.
Input files generally consist of numerical data given using the DATA command, and qualitative options given using the CONDITIONS command. Design variables in girder design input are controlled using the design variable commands USE, LOWER LIMIT, and UPPER LIMIT.
Definitions for the various command items are listed in the input glossary, which is organized into three sections: (1) DATA items, (2) CONDITIONS items, and (3) design variables.
Modifications to user input should be made using the wizards and menus to avoid introducing input syntax errors.