<s>
Abstract	B-Architecture
Interfaces	I-Architecture
for	O
Data	B-General_Concept
Analysis	I-General_Concept
(	O
AIDA	B-Application
)	O
is	O
a	O
set	O
of	O
defined	O
interfaces	O
and	O
formats	O
for	O
representing	O
common	O
data	B-General_Concept
analysis	I-General_Concept
objects	O
.	O
</s>
<s>
The	O
goals	O
of	O
the	O
AIDA	B-Application
project	O
are	O
to	O
define	O
abstract	B-Architecture
interfaces	I-Architecture
for	O
common	O
physics	O
analysis	O
objects	O
,	O
such	O
as	O
histograms	B-Algorithm
,	O
ntuples	O
(	O
or	O
data	B-Application
trees	I-Application
)	O
,	O
fitters	O
,	O
I/O	B-General_Concept
etc	O
.	O
</s>
<s>
The	O
importance	O
of	O
the	O
interface	O
concept	O
is	O
that	O
a	O
variety	O
of	O
different	O
tools	O
with	O
different	O
implementations	O
can	O
all	O
support	O
a	O
uniform	O
interface	O
:	O
this	O
encourages	O
modular	O
design	O
in	O
data	B-General_Concept
analysis	I-General_Concept
packages	O
and	O
enables	O
users	O
to	O
use	O
their	O
preferred	O
implementation	O
of	O
a	O
certain	O
functionality	O
without	O
having	O
to	O
re-write	O
existing	O
code	O
.	O
</s>
<s>
An	O
additional	O
benefit	O
of	O
AIDA	B-Application
is	O
the	O
specification	O
of	O
an	O
XML	B-Protocol
representation	O
format	O
for	O
data	O
objects	O
,	O
which	O
can	O
be	O
written	O
and	O
read	O
by	O
AIDA-compliant	O
applications	O
.	O
</s>
<s>
AIDA	B-Application
implementations	O
exist	O
for	O
C++	B-Language
(	O
OpenScientist	B-Application
)	O
,	O
Java	B-Language
(	O
Java	B-Language
Analysis	I-Language
Studio	I-Language
)	O
and	O
Python	B-Language
.	O
</s>
<s>
Usage	O
of	O
AIDA	B-Application
interfaces	O
can	O
be	O
found	O
in	O
the	O
Geant4	B-Application
examples	O
.	O
</s>
