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ed. 
In the object-oriented we represent any 
entity belonging to the real world by only 
one object, independent of this 
complexity. 
His definition involves basically two 
ideas: 
- the inherit concept 
- the ADT propriety. 
Some important concepts such as types, 
operations, messages, objects and others 
are used for various systems already 
implemented. For specifics applications of 
GDB, one of the more important concepts is 
the abstraction. The principals 
abstractions related to object-oriented 
are: 
- classification, which means a set of 
objects that share commons characteristc; 
- generalization, which describe the 
Characteristics of a class from others 
class; 
-  agregation, which represents one 
object of any complexy with one hierarchy 
of step by step more primitives objects; 
- composition, which is a ampliation of 
the concept of agregration, represents the 
complex objects through the shared objects 
and levels of abstractions which allow to 
have a lot of representations; 
- Face, which allows to take the 
differents applications or differents 
levels of abstrations. 
S. CONCLUSION 
The application of complex objects 
concepts within the Not Convencional 
Database context has expanded for others 
areas, as Office Automation, CAD and 
Decision Systems. All this applications 
try to represent the objects for modelling 
as near as the image that the user do of 
then. 
The ADT concepts attend partially this 
idea considering that the object 
representation is near of its real vision. 
The object orientation gave other 
important characteristic to the ADT, that 
is the inheritage, allowing the 
transmission of characteristics from one 
to another. These ideas are presented in 
all the most recents researchs and will 
lead the next systems in the market. 
6. BIBLIOGRAPHY 
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b) Abib, O.A - DO Sistema Geografico de 
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