| 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) |
| gen. | Data definition statement | Πρόταση ορισμού δεδομένων |
| stat. | data structure definition | ορισμός διάρθρωσης δεδομένων |
| comp., MS | data-definition query | ερώτημα ορισμού δεδομένων (An SQL-specific query that contains data definition language (DDL) statements. These statements allow you to create or alter objects in the database) |
| gen. | Dynamic data set definition | Δυναμικός ορισμός συνόλου δεδομένων |
| IT | external data definition language | εξωτερική γλώσσα ορισμού δεδομένων |
| IT | external data definition language | εξωτερική DDL |