<s>
Flex	B-Operating_System
frameworks	O
are	O
software	B-Library
libraries	I-Library
that	O
assist	O
developers	O
in	O
building	O
rich	B-Application
web	I-Application
applications	I-Application
on	O
the	O
Apache	B-Operating_System
Flex	I-Operating_System
platform	O
.	O
</s>
<s>
Cairngorm	B-Operating_System
is	O
one	O
of	O
the	O
primary	O
open-source	B-Application
software	I-Application
frameworks	O
for	O
application	O
architecture	O
in	O
Adobe	B-Operating_System
Flex	I-Operating_System
.	O
</s>
<s>
as	O
the	O
architectural	O
framework	O
for	O
rich	B-Application
web	I-Application
application	I-Application
programmers	O
.	O
</s>
<s>
Cairngorm	B-Operating_System
is	O
based	O
on	O
the	O
MVC	O
model	O
.	O
</s>
<s>
The	O
role	O
of	O
the	O
View	O
layer	O
in	O
a	O
Cairngorm	B-Operating_System
application	O
is	O
to	O
throw	O
events	O
and	O
bind	O
to	O
data	O
stored	O
in	O
the	O
Model	O
.	O
</s>
<s>
In	O
a	O
Cairngorm	B-Operating_System
Model	O
,	O
related	O
data	O
are	O
stored	O
in	O
Value	O
Objects	O
(	O
VOs	O
)	O
,	O
while	O
simple	O
variables	O
can	O
be	O
stored	O
as	O
direct	O
properties	O
of	O
the	O
ModelLocator	O
class	O
.	O
</s>
<s>
The	O
Controller	O
is	O
the	O
most	O
sophisticated	O
part	O
of	O
the	O
Cairngorm	B-Operating_System
architecture	O
.	O
</s>
<s>
A	O
Cairngorm	B-Operating_System
application	O
can	O
be	O
programmed	O
to	O
manage	O
any	O
server	O
architecture/schemas	O
.	O
</s>
