9.6. TYPE OF VARIABLES There are three types of variables presented by VMT-HART that are defined in the DDL, as follows Numeric (integer or floating point) Text (ASCII, ASCII Packed) • Enumerated (A list of corresponding string options with a list of values. Figure 9.10. Figure 9.10 – Enumerated list. If the parameter type is numeric or text, the keyboard of Android™ device will allow parameter change.