<s>
Remote	B-Protocol
database	I-Protocol
access	I-Protocol
(	O
RDA	O
)	O
is	O
a	O
protocol	O
standard	O
for	O
database	O
access	O
produced	O
in	O
1993	O
by	O
the	O
International	O
Organization	O
for	O
Standardization	O
(	O
ISO	B-General_Concept
)	O
.	O
</s>
<s>
Despite	O
early	O
efforts	O
to	O
develop	O
proof	O
of	O
concept	O
implementations	O
of	O
RDA	O
for	O
major	O
commercial	O
remote	B-Protocol
database	I-Protocol
management	O
systems	O
(	O
RDBMSs	O
)	O
(	O
including	O
Oracle	B-General_Concept
,	O
Rdb	B-Application
,	O
NonStop	B-Application
SQL	I-Application
and	O
Teradata	O
)	O
,	O
this	O
standard	O
has	O
not	O
found	O
commercial	O
support	O
from	O
database	O
vendors	O
.	O
</s>
<s>
The	O
standard	O
has	O
since	O
been	O
withdrawn	O
,	O
and	O
replaced	O
by	O
ISO/IEC	O
9579:1999	O
-	O
Information	O
technology	O
--	O
Remote	B-Protocol
Database	I-Protocol
Access	I-Protocol
for	O
SQL	O
,	O
which	O
has	O
also	O
been	O
withdrawn	O
,	O
and	O
replaced	O
by	O
ISO/IEC	O
9579:2000	O
Information	O
technology	O
--	O
Remote	B-Protocol
database	I-Protocol
access	I-Protocol
for	O
SQL	O
with	O
security	O
enhancement	O
.	O
</s>
<s>
The	O
purpose	O
of	O
RDA	O
is	O
to	O
describe	O
the	O
connection	O
of	O
a	O
database	O
client	B-Protocol
to	O
a	O
database	O
server	B-Application
.	O
</s>
<s>
communicating	O
database	O
operations	O
and	O
parameters	O
from	O
the	O
client	B-Protocol
to	O
the	O
server	B-Application
,	O
</s>
<s>
in	O
return	O
,	O
transporting	O
result	O
data	O
from	O
the	O
server	B-Application
to	O
the	O
client	B-Protocol
,	O
</s>
<s>
RDA	O
is	O
an	O
application-level	O
protocol	O
,	O
inasmuch	O
that	O
it	O
builds	O
on	O
an	O
existing	O
network	O
connection	O
between	O
client	B-Protocol
and	O
server	B-Application
.	O
</s>
<s>
In	O
the	O
case	O
of	O
TCP/IP	B-Protocol
connections	O
,	O
RFC	O
1066	O
is	O
used	O
for	O
implementing	O
RDA	O
.	O
</s>
<s>
RDA	O
was	O
published	O
in	O
1993	O
as	O
a	O
combined	O
standard	O
of	O
ANSI	O
,	O
ISO	B-General_Concept
(	O
International	O
Organization	O
for	O
Standardization	O
)	O
and	O
IEC	O
(	O
International	O
Electrotechnical	O
Commission	O
)	O
.	O
</s>
