Here's why:
* Focus: DBDL is a declarative language designed specifically for database modeling. It focuses on describing the structure and relationships of data within a database, rather than providing instructions for computations or algorithms.
* Execution: DBDL specifications are not directly executed. They are typically translated into a specific database schema (e.g., SQL DDL) that can then be used to create the database.
* Limited Functionality: DBDL does not offer the full range of functionality found in programming languages like control flow, variables, or complex data manipulation. Its scope is restricted to defining the database structure.
Analogy: Think of DBDL as a blueprint for building a house. It defines the rooms, walls, and connections, but it doesn't tell you how to build them. A programming language would be like the set of tools and instructions used to actually construct the house.
In conclusion: While DBDL is a powerful tool for database design, it is not a programming language. It is a specialized language for defining database schemas.