<s>
In	O
the	O
design	O
of	O
Java	B-Language
Web	B-Application
applications	I-Application
,	O
there	O
are	O
two	O
commonly	O
used	O
design	O
models	O
,	O
referred	O
to	O
as	O
Model	O
1	O
and	O
Model	B-Architecture
2	I-Architecture
.	O
</s>
<s>
In	O
Model	O
1	O
,	O
a	O
request	O
is	O
made	O
to	O
a	O
JSP	B-Language
or	O
servlet	B-Application
and	O
then	O
that	O
JSP	B-Language
or	O
servlet	B-Application
handles	O
all	O
responsibilities	O
for	O
the	O
request	O
,	O
including	O
processing	O
the	O
request	O
,	O
validating	O
data	O
,	O
handling	O
the	O
business	O
logic	O
,	O
and	O
generating	O
a	O
response	O
.	O
</s>
<s>
Although	O
conceptually	O
simple	O
,	O
this	O
architecture	O
is	O
not	O
conducive	O
to	O
large-scale	O
application	O
development	O
because	O
,	O
inevitably	O
,	O
a	O
great	O
deal	O
of	O
functionality	O
is	O
duplicated	O
in	O
each	O
JSP	B-Language
.	O
</s>
<s>
For	O
example	O
,	O
in	O
addition	O
to	O
an	O
HTML	B-Language
interface	O
,	O
you	O
might	O
want	O
to	O
include	O
a	O
Wireless	B-General_Concept
Markup	I-General_Concept
Language	I-General_Concept
(	O
WML	O
)	O
interface	O
for	O
wireless	O
access	O
.	O
</s>
