A data type is an element of a classification of data values, usually specified by a set of possible values.
| Data type | is parent of | integer number |
| Data type | is parent of | real number |
| Data type | is parent of | boolean |
| Data type | is parent of | character |
| Data type | is parent of | date |
| Data type | is child of | classifaction |
| Data type | is set of possible | data values |
Wikipedia. Data type