<s>
In	O
software	B-General_Concept
engineering	I-General_Concept
,	O
a	O
resource-oriented	B-Architecture
architecture	I-Architecture
(	O
ROA	O
)	O
is	O
a	O
style	O
of	O
software	B-Architecture
architecture	I-Architecture
and	O
programming	O
paradigm	O
for	O
supportive	O
designing	O
and	O
developing	O
software	O
in	O
the	O
form	O
of	O
Internetworking	O
of	O
resources	B-General_Concept
with	O
"	O
RESTful	B-Protocol
"	O
interfaces	B-Application
.	O
</s>
<s>
These	O
resources	B-General_Concept
are	O
software	O
components	O
(	O
discrete	O
pieces	B-Architecture
of	I-Architecture
code	I-Architecture
and/or	O
data	B-General_Concept
structures	I-General_Concept
)	O
which	O
can	O
be	O
reused	O
for	O
different	O
purposes	O
.	O
</s>
<s>
REST	B-Protocol
,	O
or	O
Representational	B-Protocol
State	I-Protocol
Transfer	I-Protocol
,	O
describes	O
a	O
series	O
of	O
architectural	O
constraints	O
that	O
exemplify	O
how	O
the	O
web	O
's	O
design	O
emerged	O
.	O
</s>
<s>
Various	O
concrete	O
implementations	O
of	O
these	O
ideas	O
have	O
been	O
created	O
throughout	O
time	O
,	O
but	O
it	O
has	O
been	O
difficult	O
to	O
discuss	O
the	O
REST	B-Protocol
architectural	O
style	O
without	O
blurring	O
the	O
lines	O
between	O
actual	O
software	O
and	O
the	O
architectural	O
principles	O
behind	O
it	O
.	O
</s>
<s>
In	O
Chapter	O
5	O
of	O
his	O
thesis	O
,	O
Roy	O
Fielding	O
documents	O
how	O
the	O
World	O
Wide	O
Web	O
is	O
designed	O
to	O
be	O
constrained	O
by	O
the	O
REST	B-Protocol
series	O
of	O
limitations	O
.	O
</s>
<s>
In	O
the	O
past	O
,	O
heated	O
exchanges	O
have	O
been	O
made	O
about	O
whether	O
RPC-style	O
REST	B-Protocol
architectures	I-Protocol
are	O
RESTful	B-Protocol
.	O
</s>
<s>
The	O
Resource	B-Architecture
Oriented	I-Architecture
Architecture	I-Architecture
,	O
as	O
documented	O
by	O
Leonard	O
Richardson	O
and	O
Sam	O
Ruby	O
in	O
their	O
2007	O
book	O
RESTful	B-Protocol
Web	I-Protocol
Services	I-Protocol
,	O
gives	O
concrete	O
advice	O
on	O
specific	O
technical	O
details	O
.	O
</s>
<s>
Naming	O
these	O
collections	O
of	O
guidelines	O
"	O
Resource	B-Architecture
Oriented	I-Architecture
Architecture	I-Architecture
"	O
may	O
allow	O
developers	O
to	O
discuss	O
the	O
benefits	O
of	O
an	O
architecture	O
in	O
the	O
context	O
of	O
ROA	O
.	O
</s>
<s>
Some	O
guidelines	O
are	O
already	O
common	O
within	O
the	O
larger	O
REST	B-Protocol
communities	O
such	O
as	O
:	O
that	O
an	O
application	O
should	O
expose	O
many	O
URIs	O
,	O
one	O
for	O
each	O
resource	O
;	O
and	O
that	O
processing	O
cookies	O
representing	O
IDs	O
in	O
a	O
server-side	O
session	O
is	O
not	O
RESTful	B-Protocol
.	O
</s>
<s>
Django	B-Language
,	O
</s>
<s>
TurboGears	B-Language
,	O
</s>
<s>
Flask	B-Language
,	O
</s>
<s>
JBoss	B-Operating_System
Seam	I-Operating_System
,	O
</s>
<s>
Spring	B-Application
,	O
</s>
<s>
Jersey	B-Language
,	O
</s>
<s>
NetKernel	B-Operating_System
,	O
</s>
<s>
Ruby	B-Application
on	I-Application
Rails	I-Application
,	O
</s>
<s>
Symfony	B-Language
,	O
</s>
<s>
Play	B-Language
Framework	I-Language
,	O
and	O
API	O
Platform	O
.	O
</s>
<s>
While	O
REST	B-Protocol
is	O
a	O
set	O
of	O
architectural	O
guidelines	O
applicable	O
to	O
various	O
types	O
of	O
computing	O
infrastructures	O
,	O
Resource	B-Architecture
Oriented	I-Architecture
Architecture	I-Architecture
(	O
ROA	O
)	O
is	O
only	O
coupled	O
with	O
the	O
web	O
.	O
</s>
