Logically interrelated collection of shared data physically distributed over a network		Horizontal Fragment
Manage distributed database		Homogeneous
Single Logical db split into number of _______		Unfederated MDBS
Do not require data from other sites		Distributed database
Do require data from other sites		Derived Fragment
Centralized db that can be accessed over a network		Distributed processing
A DBMS running across multiple processors and execute operations in parrallel		Shared nothing
multiple processors within a single system share system memory-tightly coupled		Fragmentation schema
Inherently centralized-loosely coupled		Global Conceptual schema
each processor is a part of complex system-Massively Parallel Processing		Local applications
All sites use the same DBMS product		Allocation schema
Sites may run differenent products		Multidatabase system
convert the language and model of different DBMS into Relational System		Vertical Fragment
Each site maintains complete autonomy		Global Applications
It is a cross between distributed DBMS and centralized DBMS		Shared Memory
in this system there are no local users		Heterogeneous
Logical description of whole database, as if it were not distributed		Shared disk
Description of how the data is to be loically Partitioned		Parallel DBMS
Description of where the data is to be located		GSC(Global System Catalog)
Information specific to distributed nature of the system		Distributed DBMS
Consist of a subset of the tuples of a relation		Gateway
Consist of a subset of the attributes of a relation		Transparency
Vertical fragment that is then horizontally fragmented		Transaction transparency
A horizontal fragment that is base on the horizontal fragmentation of parent relation		Federated MDBS
Hides implementation details from user		Distribution transparency
Allows the user to perceive the db as a single, logical entity		Fragments
Ensure that all distributed transactions maintain the DDB integrity and consistency		Mixed/Hybrid Fragment