a high-level logic design of data interaction between system components

an abstraction of the real world to fulfil the needs of a particular context

an abstract specification of what values are permissible within a system

a set of logical objects used to provide an abstraction of a portion of the real world

The product of the database design process which aims to identify and organize the required data logically, through a set of mathematical equations, and physically, through location within a central data warehouse.

The logical data structures, including operations and constraints provided by a database management system for effective database processing.