<s>
FIX	B-Algorithm
Algorithmic	I-Algorithm
Trading	I-Algorithm
Definition	I-Algorithm
Language	I-Algorithm
,	O
better	O
known	O
as	O
FIXatdl	B-Algorithm
,	O
is	O
a	O
standard	O
for	O
the	O
exchange	O
of	O
meta-information	O
required	O
to	O
enable	O
algorithmic	O
trading	O
activity	O
within	O
the	O
financial	O
markets	O
.	O
</s>
<s>
It	O
works	O
in	O
tandem	O
with	O
the	O
Financial	B-Protocol
Information	I-Protocol
eXchange	I-Protocol
(	O
FIX	O
)	O
protocol	O
which	O
is	O
the	O
lingua	O
franca	O
of	O
electronic	O
trading	O
in	O
the	O
securities	O
market	O
.	O
</s>
<s>
The	O
FIX	B-Protocol
protocol	I-Protocol
is	O
used	O
to	O
communicate	O
between	O
sell-side	O
and	O
the	O
buy-side	O
Order	O
Management	O
Systems	O
(	O
OMS	O
)	O
to	O
exchange	O
orders	O
and	O
order	O
execution	O
information	O
without	O
human	O
intervention	O
,	O
using	O
standardised	O
messages	O
and	O
workflows	O
that	O
are	O
defined	O
by	O
the	O
protocol	O
.	O
</s>
<s>
To	O
tackle	O
these	O
issues	O
,	O
FIX	B-Protocol
Protocol	I-Protocol
Limited	O
established	O
the	O
Algorithmic	O
Trading	O
Working	O
Group	O
in	O
Q3	O
2004	O
.	O
</s>
<s>
This	O
specification	O
became	O
FIXatdl	B-Algorithm
1.0	O
which	O
was	O
approved	O
by	O
the	O
FPL	O
Global	O
Technical	O
Committee	O
(	O
GTC	O
)	O
on	O
March	O
28	O
,	O
2008	O
.	O
</s>
<s>
An	O
XSD	O
schema	O
is	O
provided	O
to	O
ensure	O
that	O
FIXatdl	B-Algorithm
files	O
are	O
valid	O
and	O
well-formed	O
.	O
</s>
<s>
FIXatdl	B-Algorithm
Version	O
1.1	O
was	O
preliminarily	O
approved	O
by	O
the	O
GTC	O
on	O
February	O
9	O
,	O
2010	O
,	O
when	O
it	O
entered	O
a	O
public	O
comment	O
period	O
,	O
and	O
then	O
finally	O
approved	O
on	O
March	O
3	O
,	O
2010	O
.	O
</s>
<s>
A	O
FIXatdl	B-Algorithm
document	O
can	O
contain	O
one	O
or	O
more	O
strategy	O
definitions	O
.	O
</s>
<s>
FIXatdl	B-Algorithm
documents	O
should	O
validate	O
against	O
the	O
set	O
of	O
XSD	O
schema	O
provided	O
by	O
FPL	O
.	O
</s>
<s>
Examples	O
of	O
firms	O
supporting	O
the	O
FIXatdl	B-Algorithm
standard	O
include	O
:	O
</s>
<s>
There	O
are	O
also	O
open	O
source	O
Java	B-Device
and	O
.NET	B-Application
implementations	O
,	O
atdl4j	O
and	O
Atdl4net	O
respectively	O
,	O
which	O
are	O
both	O
Version	O
1.1	O
compliant	O
.	O
</s>
<s>
The	O
question	O
has	O
often	O
been	O
asked	O
,	O
why	O
does	O
n’t	O
FIXatdl	B-Algorithm
use	O
an	O
off-the-shelf	O
user	O
interface	O
standard	O
,	O
such	O
as	O
Mozilla	O
’s	O
XUL	B-Application
,	O
Microsoft	O
’s	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
or	O
Apache	B-Operating_System
Flex	I-Operating_System
?	O
</s>
<s>
This	O
is	O
a	O
valid	O
question	O
,	O
but	O
it	O
seems	O
that	O
the	O
authors	O
of	O
the	O
specification	O
wanted	O
to	O
maintain	O
complete	O
platform	B-Operating_System
independence	I-Operating_System
and	O
adopting	O
any	O
one	O
platform	O
would	O
risk	O
damaging	O
this	O
proposition	O
.	O
</s>
