<s>
Apache	B-Language
Sling	I-Language
is	O
an	O
open	B-Application
source	I-Application
Web	B-Application
framework	I-Application
for	O
the	O
Java	B-Device
platform	I-Device
designed	O
to	O
create	O
content-centric	O
applications	O
on	O
top	O
of	O
a	O
JSR-170-compliant	O
(	O
a.k.a.	O
</s>
<s>
JCR	O
)	O
content	B-Protocol
repository	I-Protocol
such	O
as	O
Apache	B-Language
Jackrabbit	I-Language
.	O
</s>
<s>
Apache	B-Language
Sling	I-Language
allows	O
developers	O
to	O
deploy	O
their	O
application	O
components	O
as	O
OSGi	B-Application
bundles	O
or	O
as	O
scripts	O
and	O
templates	O
in	O
the	O
content	B-Protocol
repository	I-Protocol
.	O
</s>
<s>
Supported	O
scripting	O
languages	O
are	O
JSP	B-Language
,	O
server-side	O
JavaScript	B-Language
,	O
Ruby	B-Language
,	O
Velocity	B-Language
.	O
</s>
<s>
The	O
goal	O
of	O
Apache	B-Language
Sling	I-Language
is	O
to	O
expose	O
content	O
in	O
the	O
content	B-Protocol
repository	I-Protocol
as	O
HTTP	B-Protocol
resources	O
,	O
fostering	O
a	O
RESTful	B-Protocol
style	O
of	O
application	O
architecture	O
.	O
</s>
<s>
The	O
Sling	O
project	O
was	O
started	O
on	O
August	O
27	O
,	O
2007	O
,	O
when	O
Day	O
Software	O
proposed	O
to	O
donate	O
the	O
source	O
base	O
of	O
its	O
internal	O
web	B-Application
framework	I-Application
powering	O
the	O
Day	O
Communiqué	O
WCM	O
to	O
the	O
Apache	O
Software	O
Foundation	O
.	O
</s>
<s>
The	O
project	O
was	O
accepted	O
to	O
the	O
Apache	B-Application
Incubator	I-Application
with	O
Apache	B-Language
Jackrabbit	I-Language
being	O
the	O
sponsoring	O
project	O
.	O
</s>
