<s>
OpenLayers	B-Language
is	O
an	O
open-source	B-Application
(	O
provided	O
under	O
the	O
2-clause	O
BSD	B-Operating_System
License	I-Operating_System
)	O
JavaScript	B-Language
library	B-Library
for	O
displaying	O
map	O
data	O
in	O
web	B-Application
browsers	I-Application
as	O
slippy	O
maps	O
.	O
</s>
<s>
It	O
provides	O
an	O
API	B-General_Concept
for	O
building	O
rich	O
web-based	O
geographic	O
applications	O
similar	O
to	O
Google	B-Application
Maps	I-Application
and	O
Bing	B-Application
Maps	I-Application
.	O
</s>
<s>
OpenLayers	B-Language
supports	O
GeoRSS	O
,	O
KML	B-Application
(	O
Keyhole	B-Application
Markup	I-Application
Language	I-Application
)	O
,	O
Geography	O
Markup	O
Language	O
(	O
GML	O
)	O
,	O
GeoJSON	B-General_Concept
and	O
map	O
data	O
from	O
any	O
source	O
using	O
OGC-standards	O
as	O
Web	B-Application
Map	I-Application
Service	I-Application
(	O
WMS	O
)	O
or	O
Web	O
Feature	O
Service	O
(	O
WFS	O
)	O
.	O
</s>
<s>
The	O
library	B-Library
was	O
originally	O
based	O
on	O
the	O
Prototype	B-Language
JavaScript	I-Language
Framework	I-Language
.	O
</s>
<s>
OpenLayers	B-Language
was	O
created	O
by	O
MetaCarta	O
after	O
the	O
O'Reilly	O
Where	O
2.0	O
conference	O
of	O
June	O
29	O
–	O
30	O
,	O
2005	O
,	O
and	O
released	O
as	O
open	B-Application
source	I-Application
software	I-Application
before	O
the	O
Where	O
2.0	O
conference	O
of	O
June	O
13	O
–	O
14	O
,	O
2006	O
,	O
by	O
.	O
</s>
<s>
Two	O
other	O
open-source	B-Application
mapping	O
tools	O
released	O
by	O
MetaCarta	O
are	O
FeatureServer	O
and	O
TileCache	O
.	O
</s>
<s>
Since	O
November	O
2007	O
,	O
OpenLayers	B-Language
has	O
been	O
an	O
Open	O
Source	O
Geospatial	O
Foundation	O
project	O
.	O
</s>
