7
Properties of Abstract Data Types
The data structure can only be accessed with defined operations. This set of operations is called interface and is exported by the entity. An entity with the properties just described is called an abstract data type (ADT).
•name
•date of birth
•social number
A well-defined entity which can be properly handled can be created. These entities define the data structure of a set of items
Data structure

| An ADT which consists of an abstract data structure and operations. Only the operations are viewable from the outside and define the interface.