<s>
The	O
openPDC	B-Language
is	O
a	O
complete	O
set	O
of	O
applications	O
for	O
processing	O
streaming	O
time-series	O
data	O
in	O
real-time	O
.	O
</s>
<s>
Due	O
to	O
the	O
system	O
's	O
modular	O
design	O
,	O
the	O
openPDC	B-Language
can	O
be	O
classified	O
as	O
a	O
generic	O
event	B-Application
stream	I-Application
processor	I-Application
.	O
</s>
<s>
The	O
openPDC	B-Language
is	O
based	O
on	O
the	O
SuperPDC	O
which	O
was	O
developed	O
by	O
the	O
Tennessee	O
Valley	O
Authority	O
starting	O
in	O
2004	O
.	O
</s>
<s>
The	O
openPDC	B-Language
officially	O
launched	O
on	O
October	O
7	O
,	O
2009	O
.	O
</s>
<s>
The	O
first	O
stable	O
release	O
of	O
the	O
openPDC	B-Language
was	O
made	O
available	O
on	O
January	O
28	O
,	O
2010	O
.	O
</s>
<s>
Then	O
on	O
February	O
23	O
,	O
2010	O
,	O
AREVA	O
T&D	O
announced	O
that	O
they	O
would	O
be	O
providing	O
commercial	O
support	O
for	O
the	O
openPDC	B-Language
.	O
</s>
<s>
Finally	O
,	O
on	O
April	O
1	O
,	O
2010	O
,	O
the	O
Grid	O
Protection	O
Alliance	O
inherited	O
development	O
of	O
the	O
openPDC	B-Language
and	O
entered	O
into	O
a	O
contract	O
with	O
the	O
North	O
American	O
Electric	O
Reliability	O
Corporation	O
in	O
an	O
effort	O
to	O
further	O
enable	O
its	O
use	O
as	O
a	O
distributed	B-Architecture
system	I-Architecture
.	O
</s>
<s>
These	O
adapters	O
can	O
be	O
configured	O
using	O
any	O
one	O
of	O
three	O
supported	O
database	O
systems	O
:	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
,	O
MySQL	B-Application
,	O
and	O
Microsoft	B-Application
Access	I-Application
.	O
</s>
<s>
The	O
openPDC	B-Language
implements	O
a	O
number	O
of	O
standard	O
phasor	O
protocols	O
which	O
can	O
be	O
used	O
to	O
receive	O
data	O
from	O
devices	O
.	O
</s>
<s>
The	O
files	O
produced	O
by	O
the	O
historian	O
can	O
later	O
be	O
analyzed	O
using	O
Hadoop	B-Application
.	O
</s>
<s>
The	O
historian	O
is	O
also	O
designed	O
to	O
be	O
used	O
in	O
distributed	B-Architecture
systems	I-Architecture
,	O
having	O
a	O
single	O
node	B-Protocol
dedicated	O
to	O
archival	O
and	O
several	O
others	O
sending	O
concentrated	O
measurements	O
to	O
the	O
central	O
archive	O
.	O
</s>
<s>
This	O
design	O
even	O
allows	O
for	O
its	O
use	O
in	O
any	O
distributed	B-Architecture
system	I-Architecture
enabling	O
one	O
PDC	O
to	O
filter	O
measurements	O
to	O
another	O
that	O
is	O
running	O
a	O
resource	O
intensive	O
adapter	O
.	O
</s>
<s>
Applications	O
included	O
in	O
the	O
openPDC	B-Language
project	O
:	O
</s>
<s>
The	O
openPDC	B-Language
Console	O
is	O
an	O
application	O
that	O
can	O
be	O
used	O
to	O
send	O
and	O
receive	O
messages	O
between	O
the	O
openPDC	B-Language
service	O
and	O
a	O
client	O
machine	O
.	O
</s>
<s>
The	O
openPDC	B-Language
Manager	O
is	O
a	O
utility	O
intended	O
to	O
allow	O
remote	O
access	O
and	O
simplify	O
adapter	O
configurations	O
in	O
the	O
database	O
.	O
</s>
