<s>
GDL	O
uses	O
context-free	O
formal	O
grammar	O
named	O
GDLs	O
(	O
Gesture	B-General_Concept
Description	I-General_Concept
Language	I-General_Concept
script	O
)	O
.	O
</s>
<s>
Those	O
rules	O
play	O
similar	O
role	O
as	O
rules	O
in	O
classic	O
expert	B-Application
systems	I-Application
.	O
</s>
<s>
The	O
latest	O
GDL	O
implementations	O
utilize	O
Microsoft	B-Algorithm
Kinect	I-Algorithm
controller	O
and	O
enable	O
real	O
time	O
classification	O
.	O
</s>
