<s>
Plain	B-Language
Old	I-Language
XML	I-Language
(	O
POX	O
)	O
is	O
the	O
basic	O
XML	B-Protocol
,	O
sometimes	O
mixed	O
in	O
with	O
other	O
,	O
blendable	O
specifications	O
like	O
XML	B-Language
Namespaces	I-Language
,	O
Dublin	O
Core	O
,	O
XInclude	O
and	O
XLink	O
.	O
</s>
<s>
This	O
contrasts	O
with	O
complicated	O
,	O
multilayered	O
XML	B-Protocol
specifications	I-Protocol
like	O
those	O
for	O
web	O
services	O
or	O
RDF	O
.	O
</s>
<s>
The	O
term	O
may	O
have	O
been	O
derived	O
from	O
or	O
inspired	O
by	O
the	O
expression	O
plain	O
old	O
telephone	O
service	O
(	O
POTS	O
)	O
and	O
,	O
similarly	O
Plain	B-Language
Old	I-Language
Java	I-Language
Object	I-Language
(	O
POJO	B-Language
)	O
.	O
</s>
<s>
An	O
interesting	O
question	O
is	O
how	O
POX	O
relates	O
to	O
XML	B-Protocol
Schema	O
.	O
</s>
<s>
On	O
the	O
one	O
hand	O
,	O
POX	O
is	O
completely	O
compatible	O
with	O
XML	B-Protocol
Schema	O
.	O
</s>
<s>
However	O
,	O
many	O
POX	O
users	O
eschew	O
XML	B-Protocol
Schema	O
to	O
avoid	O
the	O
poor	O
or	O
inconsistent	O
quality	O
of	O
XML	B-Protocol
Schema-to-Java	O
tools	O
.	O
</s>
<s>
POX	O
is	O
complementary	O
to	O
REST	B-Protocol
:	O
REST	B-Protocol
refers	O
to	O
a	O
communication	O
pattern	O
,	O
while	O
POX	O
refers	O
to	O
an	O
information	O
format	O
style	O
.	O
</s>
<s>
The	O
primary	O
competitors	O
to	O
POX	O
are	O
more	O
strictly-defined	O
XML-based	O
information	O
formats	O
such	O
as	O
RDF	O
and	O
SOAP	B-Protocol
section	I-Protocol
5	I-Protocol
encoding	I-Protocol
,	O
as	O
well	O
as	O
general	O
non-XML	O
information	O
formats	O
such	O
as	O
JSON	B-General_Concept
and	O
CSV	O
.	O
</s>
