<s>
to	O
improve	O
or	O
adapt	O
its	O
contents	O
by	O
adding/removing	O
material	O
(	O
like	O
wiki	B-Protocol
)	O
.	O
</s>
<s>
as	O
a	O
collaborative	B-Application
tool	I-Application
,	O
e.g.	O
</s>
<s>
Annotation	O
system	O
Private	O
notes	O
Private	O
group	O
notes	O
Public	O
notes	O
Notification	O
Highlighting	O
Formatted	O
text	O
Archives	O
Viewing	O
annotations	O
API	O
License	O
Notes	O
A.nnotate	B-Application
See	O
A.nnotate	B-Application
notifications	O
Proprietary	O
Can	O
annotate	O
PDF	O
,	O
ODF	O
,	O
.doc	O
,	O
.docx	O
,	O
images	O
,	O
as	O
well	O
as	O
web	O
pages	O
(	O
but	O
only	O
a	O
limited	O
number	O
in	O
the	O
free	O
version	O
)	O
Diigo	O
Proprietary	O
Public	O
annotations	O
are	O
only	O
allowed	O
for	O
established	O
users	O
.	O
</s>
<s>
Hypothes.is	B-Application
Chrome	O
,	O
via.hypothes.isMIT	O
,	O
BSD	O
In	O
February	O
2015	O
,	O
different	O
features	O
were	O
announced	O
,	O
such	O
as	O
private	O
group	O
annotation	O
,	O
semantic	O
tagging	O
,	O
moderation	O
,	O
etc	O
.	O
</s>
<s>
Org-mode	B-Operating_System
(	O
with	O
extensions	O
)	O
Technically	O
,	O
public	O
annotations	O
are	O
possible	O
via	O
the	O
"	O
publish	O
to	O
HTML	O
"	O
feature	O
of	O
org	B-Operating_System
mode	I-Operating_System
--	O
but	O
no	O
method	O
for	O
notifications	O
or	O
discovery	O
of	O
public	O
annotations	O
written	O
by	O
others	O
is	O
currently	O
known	O
.	O
</s>
<s>
System	O
Notes	O
Date	O
Discontinued	O
Mosaic	O
Browser	O
An	O
early	O
version	O
of	O
the	O
Mosaic	O
browser	O
was	O
tested	O
with	O
collaborative	B-Application
annotation	O
feature	O
in	O
1993	O
but	O
never	O
passed	O
the	O
test	O
state	O
.	O
</s>
<s>
CritLink	O
worked	O
as	O
an	O
HTML	O
"	O
mediator	O
"	O
,	O
hence	O
not	O
requiring	O
additional	O
software	O
or	O
browser	O
extensions	O
but	O
having	O
limited	O
support	O
for	O
modern	O
JavaScript-driven	O
websites	O
.	O
</s>
<s>
It	O
was	O
shut	O
in	O
April	O
2001	O
because	O
it	O
could	O
n't	O
generate	O
enough	O
advertising	O
revenue	O
to	O
stay	O
in	O
business.Third	O
Voice	O
Trails	O
Off	O
,	O
Wired	O
News	O
,	O
April	O
4	O
,	O
2001	O
April	O
2001	O
Delicious	B-Application
Founded	O
in	O
2003	O
and	O
provided	O
cloud	O
bookmarks	O
with	O
optional	O
descriptions	O
(	O
a	O
form	O
of	O
annotation	O
)	O
of	O
up	O
to	O
1000	O
characters	O
.	O
</s>
<s>
The	O
project	O
was	O
discontinued	O
in	O
2009	O
when	O
the	O
storage	O
wiki	B-Protocol
went	O
offline	O
.	O
</s>
<s>
Discontinued	O
in	O
2010.Farewell	O
Fleck.com,	O
"	O
The	O
Next	O
Web	O
"	O
,	O
May	O
10	O
,	O
2010	O
2010	O
stet	B-Protocol
Stet	B-Protocol
was	O
the	O
Gplv3	O
comment	O
system	O
.	O
</s>
<s>
Google	B-Application
Sidewiki	I-Application
Launched	O
in	O
2009	O
.	O
</s>
<s>
December	O
2011	O
SharedCopy	B-General_Concept
An	O
AJAX	O
based	O
web	O
annotation	O
tool	O
that	O
allowed	O
users	O
to	O
mark-up	O
,	O
highlight	O
,	O
draw	O
,	O
annotate	O
,	O
cache	O
,	O
sticky-note	O
and	O
finally	O
share	O
any	O
website	O
.	O
</s>
<s>
The	O
body	O
can	O
be	O
a	O
literal	O
value	O
or	O
structured	O
content	O
(	O
a	O
URI	B-Protocol
)	O
.	O
</s>
<s>
The	O
target	O
can	O
be	O
identified	O
by	O
an	O
URI	B-Protocol
(	O
e.g.	O
,	O
fragment	O
identifiers	O
)	O
and/or	O
a	O
selector	O
that	O
defines	O
a	O
domain-	O
,	O
resource	O
-	O
or	O
application-specific	O
access	O
protocol	O
,	O
e.g.	O
,	O
offset-based	O
,	O
XPath-based	O
,	O
etc	O
.	O
</s>
<s>
Web	O
Annotation	O
can	O
be	O
used	O
in	O
conjunction	O
with	O
(	O
or	O
as	O
an	O
alternative	O
to	O
)	O
fragment	O
identifiers	O
that	O
describe	O
how	O
to	O
address	O
elements	O
within	O
a	O
web	O
document	O
by	O
means	O
of	O
URIs	B-Protocol
.	O
</s>
