| Subject | English | Greek |
| comp., MS | data definition language | γλώσσα ορισμού δεδομένων (A language that defines all attributes and properties of a database, especially record layouts, field definitions, key fields, file locations, and storage strategy) |
| IT | external data definition language | εξωτερική γλώσσα ορισμού δεδομένων |
| IT | external data definition language | εξωτερική DDL |