<s>
On	O
the	O
World	O
Wide	O
Web	O
,	O
a	O
web	B-General_Concept
feed	I-General_Concept
(	O
or	O
news	B-General_Concept
feed	I-General_Concept
)	O
is	O
a	O
data	O
format	O
used	O
for	O
providing	O
users	O
with	O
frequently	O
updated	O
content	O
.	O
</s>
<s>
Content	O
distributors	O
syndicate	O
a	O
web	B-General_Concept
feed	I-General_Concept
,	O
thereby	O
allowing	O
users	O
to	O
subscribe	O
a	O
channel	O
to	O
it	O
by	O
adding	O
the	O
feed	O
resource	O
address	O
to	O
a	O
news	B-Application
aggregator	I-Application
client	O
(	O
also	O
called	O
a	O
feed	B-Application
reader	I-Application
or	O
a	O
news	O
reader	O
)	O
.	O
</s>
<s>
Users	O
typically	O
subscribe	O
to	O
a	O
feed	O
by	O
manually	O
entering	O
the	O
URL	O
of	O
a	O
feed	O
or	O
clicking	O
a	O
link	O
in	O
a	O
web	B-Application
browser	I-Application
or	O
by	O
dragging	O
the	O
link	O
from	O
the	O
web	B-Application
browser	I-Application
to	O
the	O
aggregator	O
,	O
thus	O
"	O
RSS	O
and	O
Atom	B-Application
files	O
provide	O
news	O
updates	O
from	O
a	O
website	O
in	O
a	O
simple	O
form	O
for	O
your	O
computer.	O
"	O
</s>
<s>
The	O
kinds	O
of	O
content	O
delivered	O
by	O
a	O
web	B-General_Concept
feed	I-General_Concept
are	O
typically	O
HTML	B-Application
(	O
webpage	O
content	O
)	O
or	O
links	O
to	O
webpages	O
and	O
other	O
kinds	O
of	O
digital	O
media	O
.	O
</s>
<s>
Often	O
when	O
websites	O
provide	O
web	B-General_Concept
feeds	I-General_Concept
to	O
notify	O
users	O
of	O
content	O
updates	O
,	O
they	O
only	O
include	O
summaries	O
in	O
the	O
web	B-General_Concept
feed	I-General_Concept
rather	O
than	O
the	O
full	O
content	O
itself	O
.	O
</s>
<s>
Many	O
news	O
websites	O
,	O
weblogs	O
,	O
schools	O
,	O
and	O
podcasters	O
operate	O
web	B-General_Concept
feeds	I-General_Concept
.	O
</s>
<s>
As	O
web	B-General_Concept
feeds	I-General_Concept
are	O
designed	O
to	O
be	O
machine-readable	B-General_Concept
rather	O
than	O
human-readable	B-General_Concept
they	O
can	O
also	O
be	O
used	O
to	O
automatically	O
transfer	O
information	O
from	O
one	O
website	O
to	O
another	O
without	O
any	O
human	O
intervention	O
.	O
</s>
<s>
A	O
web	B-General_Concept
feed	I-General_Concept
is	O
a	O
document	O
(	O
often	O
XML-based	O
)	O
whose	O
discrete	O
content	O
items	O
include	O
web	O
links	O
to	O
the	O
source	O
of	O
the	O
content	O
.	O
</s>
<s>
News	O
websites	O
and	O
blogs	O
are	O
common	O
sources	O
for	O
web	B-General_Concept
feeds	I-General_Concept
,	O
but	O
feeds	O
are	O
also	O
used	O
to	O
deliver	O
structured	O
information	O
ranging	O
from	O
weather	O
data	O
to	O
search	B-Application
results	I-Application
.	O
</s>
<s>
Common	O
web	B-General_Concept
feed	I-General_Concept
formats	O
are	O
:	O
</s>
<s>
The	O
feed	O
icon	O
indicates	O
that	O
a	O
web	B-General_Concept
feed	I-General_Concept
is	O
available	O
.	O
</s>
<s>
With	O
the	O
prevalence	O
of	O
JSON	B-General_Concept
in	O
Web	B-General_Concept
APIs	I-General_Concept
,	O
a	O
further	O
format	O
,	O
JSON	B-General_Concept
Feed	I-General_Concept
,	O
was	O
defined	O
in	O
2017	O
.	O
</s>
<s>
This	O
new	O
version	O
,	O
which	O
reclaimed	O
the	O
name	O
RDF	O
Site	O
Summary	O
from	O
RSS	O
0.9	O
,	O
reintroduced	O
support	O
for	O
RDF	O
and	O
added	O
XML	B-Language
namespaces	I-Language
support	O
,	O
adopting	O
elements	O
from	O
standard	O
metadata	O
vocabularies	O
such	O
as	O
Dublin	O
Core	O
.	O
</s>
<s>
Because	O
neither	O
Winer	O
nor	O
the	O
RSS-DEV	O
Working	O
Group	O
had	O
Netscape	B-Protocol
's	O
involvement	O
,	O
they	O
could	O
not	O
make	O
an	O
official	O
claim	O
on	O
the	O
RSS	O
name	O
or	O
format	O
.	O
</s>
<s>
One	O
product	O
of	O
that	O
contentious	O
debate	O
was	O
the	O
creation	O
of	O
an	O
alternative	O
syndication	O
format	O
,	O
Atom	B-Application
,	O
that	O
began	O
in	O
June	O
2003	O
.	O
</s>
<s>
The	O
Atom	B-Application
syndication	I-Application
format	I-Application
,	O
whose	O
creation	O
was	O
in	O
part	O
motivated	O
by	O
a	O
desire	O
to	O
get	O
a	O
clean	O
start	O
free	O
of	O
the	O
issues	O
surrounding	O
RSS	O
,	O
has	O
been	O
adopted	O
as	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
Winer	O
launched	O
the	O
RSS	O
Advisory	O
Board	O
with	O
Brent	B-Application
Simmons	I-Application
and	O
Jon	O
Udell	O
,	O
a	O
group	O
whose	O
purpose	O
was	O
to	O
maintain	O
and	O
publish	O
the	O
specification	O
and	O
answer	O
questions	O
about	O
the	O
format	O
.	O
</s>
<s>
Outlook	O
team	O
announced	O
on	O
their	O
blogs	O
that	O
they	O
were	O
adopting	O
the	O
feed	O
icon	O
first	O
used	O
in	O
the	O
Mozilla	B-Application
Firefox	I-Application
browser	B-Application
,	O
created	O
by	O
Stephen	O
Horlander	O
,	O
a	O
Mozilla	O
Designer	O
.	O
</s>
<s>
This	O
effectively	O
made	O
the	O
orange	O
square	O
with	O
white	O
radio	O
waves	O
the	O
industry	O
standard	O
for	O
RSS	O
and	O
Atom	B-Application
feeds	I-Application
,	O
replacing	O
the	O
large	O
variety	O
of	O
icons	O
and	O
text	O
that	O
had	O
been	O
used	O
previously	O
to	O
identify	O
syndication	O
data	O
.	O
</s>
<s>
Web	B-General_Concept
feeds	I-General_Concept
have	O
some	O
advantages	O
compared	O
to	O
receiving	O
frequently	O
published	O
content	O
via	O
an	O
email	O
:	O
</s>
