Column
Describes a type of column within the tabular file. There are only two types: numeric and text The numeric type should be used for numeric data (float, double, long, int, etc.). In addition, use the numeric type for boolean values, which are stored 1.0 = true, 0.0 = false). The text type should be used for strings and date/time data. Date/time data is saved as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS"). If you need more type complexity, you should use a database.