<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
(	O
SMW	O
)	O
is	O
an	O
extension	O
to	O
MediaWiki	B-Application
that	O
allows	O
for	O
annotating	O
semantic	O
data	O
within	O
wiki	B-Protocol
pages	O
,	O
thus	O
turning	O
a	O
wiki	B-Protocol
that	O
incorporates	O
the	O
extension	O
into	O
a	O
semantic	O
wiki	B-Protocol
.	O
</s>
<s>
Data	O
that	O
has	O
been	O
encoded	O
can	O
be	O
used	O
in	O
semantic	O
searches	O
,	O
used	O
for	O
aggregation	O
of	O
pages	O
,	O
displayed	O
in	O
formats	O
like	O
maps	O
,	O
calendars	B-Application
and	O
graphs	B-Application
,	O
and	O
exported	O
to	O
the	O
outside	O
world	O
via	O
formats	O
like	O
RDF	O
and	O
CSV	O
.	O
</s>
<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
was	O
initially	O
created	O
by	O
Markus	O
Krötzsch	O
,	O
Denny	O
Vrandečić	O
and	O
Max	O
Völkel	O
,	O
and	O
was	O
first	O
released	O
in	O
2005	O
.	O
</s>
<s>
Every	O
semantic	O
annotation	O
within	O
SMW	O
is	O
a	O
"	O
property	O
"	O
connecting	O
the	O
page	O
on	O
which	O
it	O
resides	O
to	O
some	O
other	O
piece	O
of	O
data	O
,	O
either	O
another	O
page	O
or	O
a	O
data	O
value	O
of	O
some	O
type	O
,	O
using	O
triples	B-Application
of	O
the	O
form	O
"	O
subject	O
,	O
predicate	O
,	O
object	O
"	O
.	O
</s>
<s>
However	O
,	O
the	O
much	O
more	O
common	O
way	O
of	O
storing	O
data	O
within	O
Semantic	B-Protocol
MediaWiki	I-Protocol
is	O
via	O
MediaWiki	B-Application
templates	O
which	O
themselves	O
contain	O
the	O
necessary	O
SMW	O
markup	O
.	O
</s>
<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
developers	O
have	O
estimated	O
that	O
99%	O
of	O
SMW	O
data	O
is	O
stored	O
in	O
this	O
way	O
.	O
</s>
<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
also	O
has	O
its	O
own	O
inline	O
querying	O
tools	O
.	O
</s>
<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
is	O
in	O
use	O
on	O
over	O
1,600	O
public	O
active	O
wikis	B-Protocol
around	O
the	O
world	O
,	O
in	O
addition	O
to	O
an	O
unknown	O
number	O
of	O
private	O
wikis	B-Protocol
.	O
</s>
<s>
Notable	O
public	O
wikis	B-Protocol
that	O
use	O
SMW	O
include	O
the	O
Metacafe	O
wiki	B-Protocol
,	O
Web	O
Platform	O
,	O
SNPedia	O
,	O
SKYbrary	O
,	O
Metavid	B-Protocol
,	O
Familypedia	O
,	O
OpenEI	O
,	O
the	O
Libreplanet	O
wiki	B-Protocol
,	O
the	O
Free	O
Software	O
Directory	O
and	O
translatewiki.net	B-Language
.	O
</s>
<s>
Semantic	B-Protocol
MediaWiki	I-Protocol
is	O
also	O
supported	O
on	O
the	O
wiki	B-Protocol
farm	O
Referata	O
,	O
by	O
default	O
.	O
</s>
<s>
Wikia	O
has	O
previously	O
activated	O
Semantic	B-Protocol
MediaWiki	I-Protocol
on	O
user	O
request	O
,	O
but	O
has	O
stopped	O
doing	O
so	O
since	O
upgrading	O
to	O
version	O
1.19	O
of	O
MediaWiki	B-Application
;	O
Wikia	O
sites	O
,	O
such	O
as	O
Familypedia	O
,	O
that	O
had	O
started	O
using	O
it	O
are	O
able	O
to	O
continue	O
.	O
</s>
<s>
The	O
Wikimedia	O
community	O
began	O
adding	O
semantic	O
microformat	B-General_Concept
markup	O
to	O
Wikipedia	O
in	O
2007	O
.	O
</s>
<s>
In	O
2010	O
,	O
Wikimedia	O
Foundation	O
Deputy	O
Director	O
Erik	O
Möller	O
stated	O
that	O
Wikimedia	O
was	O
interested	O
in	O
adding	O
semantic	O
capabilities	O
to	O
Wikipedia	O
,	O
but	O
that	O
they	O
were	O
unsure	O
whether	O
Semantic	B-Protocol
MediaWiki	I-Protocol
was	O
the	O
right	O
solution	O
,	O
since	O
it	O
was	O
unclear	O
whether	O
it	O
could	O
be	O
used	O
without	O
negatively	O
affecting	O
Wikipedia	O
's	O
performance	O
.	O
</s>
<s>
Wikidata	O
supplants	O
the	O
potential	O
use	O
of	O
Semantic	B-Protocol
MediaWiki	I-Protocol
on	O
Wikipedia	O
,	O
its	O
software	O
uses	O
Wikibase	O
.	O
</s>
<s>
A	O
variety	O
of	O
open-source	O
MediaWiki	B-Application
extensions	O
exist	O
that	O
use	O
the	O
data	O
structure	O
provided	O
by	O
Semantic	B-Protocol
MediaWiki	I-Protocol
.	O
</s>
<s>
The	O
official	O
gathering	O
for	O
Semantic	B-Protocol
MediaWiki	I-Protocol
developers	O
and	O
users	O
is	O
SMWCon	O
,	O
which	O
has	O
been	O
held	O
twice	O
a	O
year	O
since	O
2010	O
,	O
in	O
various	O
cities	O
in	O
the	O
United	O
States	O
and	O
Europe	O
.	O
</s>
