This object indicates the data type of a hardware feature's values: an enumerated list, a string, an integer, or a floating-point number, which in turn determines how the caps, default, and other variable fields should be interpreted. Admins use it to know how to parse the associated variable's values correctly. For example, a value of integer(3) would mean the feature's allowed range is expressed as a (min, max) pair of integer values in its caps field.