<s>
JSON	B-General_Concept
Feed	I-General_Concept
is	O
a	O
Web	B-General_Concept
feed	I-General_Concept
file	O
format	O
for	O
Web	O
syndication	O
in	O
JSON	B-General_Concept
instead	O
of	O
XML	B-Protocol
as	O
used	O
by	O
RSS	O
and	O
Atom	B-Application
.	O
</s>
<s>
A	O
range	O
of	O
software	O
libraries	O
and	O
web	O
frameworks	O
support	O
content	O
syndication	O
via	O
JSON	B-General_Concept
Feed	I-General_Concept
.	O
</s>
<s>
Supporting	O
clients	O
include	O
NetNewsWire	B-Application
,	O
NewsBlur	B-Application
,	O
ReadKit	O
and	O
Reeder	O
.	O
</s>
<s>
Notable	O
publishers	O
include	O
NPR	O
and	O
the	O
Microblogging	O
platform	O
Micro.blog	B-Protocol
,	O
which	O
uses	O
it	O
as	O
the	O
response	O
format	O
for	O
many	O
API	O
calls	O
.	O
</s>
<s>
Custom	O
objects	O
may	O
also	O
be	O
used	O
by	O
publishers	O
,	O
but	O
feed	B-Application
readers	I-Application
that	O
do	O
not	O
understand	O
it	O
must	O
ignore	O
it	O
.	O
</s>
