<s>
Federated	O
is	O
a	O
storage	B-General_Concept
engine	I-General_Concept
for	O
the	O
MySQL	B-Application
MariaDB	B-Application
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
that	O
allows	O
creation	O
of	O
a	O
table	O
that	O
is	O
a	O
local	O
representation	O
of	O
a	O
foreign	O
(	O
remote	O
)	O
table	O
.	O
</s>
<s>
It	O
uses	O
the	O
MySQL	B-Application
client	O
library	O
API	O
as	O
a	O
data	O
transport	O
,	O
treating	O
remote	O
tables	O
as	O
if	O
they	O
were	O
located	O
on	O
the	O
local	O
server	O
.	O
</s>
<s>
The	O
actual	O
data	O
can	O
exist	O
on	O
a	O
local	O
or	O
remote	O
MySQL	B-Application
instance	O
.	O
</s>
<s>
The	O
MySQL	B-Language
Federated	I-Language
Storage	B-General_Concept
Engine	I-General_Concept
was	O
authored	O
by	O
Patrick	O
Galbraith	O
and	O
Brian	O
Aker	O
and	O
is	O
currently	O
being	O
maintained	O
by	O
Patrick	O
Galbraith	O
and	O
Antony	O
Curtis	O
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
2005	O
with	O
MySQL	B-Application
5.0	I-Application
.	O
</s>
