<s>
dotXSI	B-Device
is	O
an	O
ASCII	B-Protocol
file	I-Protocol
format	O
of	O
Softimage	B-Device
Corporation	O
for	O
storing	O
scene	O
data	O
.	O
</s>
<s>
It	O
includes	O
support	O
for	O
meshes	B-Algorithm
,	O
NURBS	B-Algorithm
,	O
2D	O
and	O
3D	O
chains	O
,	O
polygons	B-General_Concept
,	O
materials	O
,	O
hierarchies	O
,	O
skeletons	O
,	O
animation	O
constraints	O
,	O
Hermite	O
splines	O
,	O
custom	O
effects	O
,	O
and	O
user	O
data	O
.	O
</s>
<s>
Common	O
applications	O
are	O
architecture	O
design	O
and	O
video	O
games	O
,	O
becoming	O
popular	O
after	O
Valve	O
pioneered	O
its	O
use	O
in	O
Half-Life	B-Application
2	I-Application
.	O
</s>
<s>
It	O
was	O
based	O
on	O
DirectX	B-Application
's	O
X	O
file	O
format	O
,	O
and	O
extended	O
to	O
handle	O
much	O
of	O
those	O
specific	O
data	O
structures	O
.	O
</s>
<s>
The	O
'	O
Crosswalk	O
 '	O
SDK	O
includes	O
the	O
ability	O
to	O
transfer	O
data	O
between	O
dotXSI	B-Device
files	O
and	O
the	O
formats	O
of	O
other	O
autodesk	O
products	O
.	O
</s>
