<s>
GData	B-Application
(	O
Google	B-Application
Data	I-Application
Protocol	I-Application
)	O
provides	O
a	O
simple	O
protocol	O
for	O
reading	O
and	O
writing	O
data	O
on	O
the	O
Internet	O
,	O
designed	O
by	O
Google	B-Application
.	I-Application
</s>
<s>
GData	B-Application
combines	O
common	O
XML-based	O
syndication	O
formats	O
(	O
Atom	B-Application
and	O
RSS	O
)	O
with	O
a	O
feed-publishing	O
system	O
based	O
on	O
the	O
Atom	B-Application
Publishing	I-Application
Protocol	I-Application
,	O
plus	O
some	O
extensions	O
for	O
handling	O
queries	O
.	O
</s>
<s>
It	O
relies	O
on	O
XML	B-Protocol
or	O
JSON	B-General_Concept
as	O
a	O
data	O
format	O
.	O
</s>
<s>
According	O
to	O
the	B-Application
Google	I-Application
Developers	O
portal	O
,	O
"	O
The	B-Application
Google	I-Application
Data	O
Protocol	O
is	O
a	O
REST-inspired	O
technology	O
for	O
reading	O
,	O
writing	O
,	O
and	O
modifying	O
information	O
on	O
the	O
web	O
.	O
</s>
<s>
It	O
is	O
used	O
in	O
some	O
older	O
Google	B-Application
APIs.	O
"	O
</s>
<s>
However	O
,	O
"	O
Most	O
Google	B-Application
APIs	O
are	O
not	O
Google	B-Application
Data	O
APIs.	O
"	O
</s>
<s>
Google	B-Application
provides	O
GData	B-Application
client	B-Protocol
libraries	B-Library
for	O
Java	B-Language
,	O
JavaScript	B-Language
,	O
.NET	B-Application
,	O
PHP	B-Application
,	O
Python	B-Language
,	O
and	O
Objective-C	B-Language
.	O
</s>
<s>
An	O
implementation	O
called	O
libgdata	O
written	O
in	O
C	B-Language
is	O
available	O
under	O
the	O
LGPL	B-Application
license	I-Application
.	O
</s>
