<s>
Schema.org	B-Application
is	O
a	O
reference	O
website	O
that	O
publishes	O
documentation	O
and	O
guidelines	O
for	O
using	O
structured	B-Application
data	I-Application
mark-up	O
on	O
web-pages	O
(	O
called	O
microdata	B-General_Concept
)	O
.	O
</s>
<s>
Its	O
main	O
objective	O
is	O
to	O
standardize	O
HTML	B-Language
tags	O
to	O
be	O
used	O
by	O
webmasters	O
for	O
creating	O
rich	O
results	O
(	O
displayed	O
as	O
visual	O
data	O
or	O
infographic	O
tables	O
on	O
search	B-Application
engine	I-Application
results	O
)	O
about	O
a	O
certain	O
topic	O
of	O
interest	O
.	O
</s>
<s>
Schema.org	B-Application
is	O
an	O
initiative	O
launched	O
on	O
June	O
2	O
,	O
2011	O
,	O
by	O
Bing	B-Application
,	O
Google	B-Application
and	O
Yahoo	B-Application
!	I-Application
</s>
<s>
(	O
operators	O
of	O
the	O
world	O
's	O
largest	O
search	B-Application
engines	I-Application
at	O
that	O
time	O
)	O
to	O
create	O
and	O
support	O
a	O
common	O
set	O
of	O
schemas	O
for	O
structured	B-Application
data	I-Application
markup	O
on	O
web	O
pages	O
.	O
</s>
<s>
In	O
November	O
2011	O
,	O
Yandex	O
(	O
whose	O
search	B-Application
engine	I-Application
is	O
the	O
largest	O
in	O
Russia	O
)	O
joined	O
the	O
initiative	O
.	O
</s>
<s>
They	O
propose	O
using	O
the	O
schema.org	B-Application
vocabulary	O
along	O
with	O
the	O
Microdata	B-General_Concept
,	O
RDFa	B-General_Concept
,	O
or	O
JSON-LD	B-Protocol
formats	O
to	O
mark	O
up	O
website	O
content	O
with	O
metadata	O
about	O
itself	O
.	O
</s>
<s>
Such	O
markup	O
can	O
be	O
recognized	O
by	O
search	B-Application
engine	I-Application
spiders	I-Application
and	O
other	O
parsers	B-Language
,	O
thus	O
granting	O
access	O
to	O
the	O
meaning	O
of	O
the	O
sites	O
(	O
see	O
Semantic	O
Web	O
)	O
.	O
</s>
<s>
In	O
2012	O
,	O
the	O
GoodRelations	O
ontology	B-Language
was	O
integrated	O
into	O
Schema.org	B-Application
.	O
</s>
<s>
Much	O
of	O
the	O
vocabulary	O
on	O
Schema.org	B-Application
was	O
inspired	O
by	O
earlier	O
formats	O
,	O
such	O
as	O
microformats	B-General_Concept
,	O
FOAF	O
,	O
and	O
OpenCyc	B-Application
.	O
</s>
<s>
Microformats	B-General_Concept
,	O
with	O
its	O
most	O
dominant	O
representative	O
hCard	B-General_Concept
,	O
continue	O
(	O
as	O
of	O
2015	O
)	O
to	O
be	O
published	O
widely	O
on	O
the	O
web	O
,	O
where	O
the	O
deployment	O
of	O
Schema.org	B-Application
has	O
strongly	O
increased	O
between	O
2012	O
and	O
2014	O
.	O
</s>
<s>
In	O
2015	O
,	O
Google	B-Application
began	O
supporting	O
the	O
JSON-LD	B-Protocol
format	O
,	O
and	O
as	O
of	O
September	O
,	O
2017	O
recommended	O
using	O
JSON-LD	B-Protocol
for	O
structured	B-Application
data	I-Application
whenever	O
possible	O
.	O
</s>
<s>
Despite	O
the	O
advantages	O
of	O
using	O
Schema.org,	O
adoption	O
remained	O
limited	O
as	O
of	O
2016	O
.	O
</s>
<s>
Such	O
validators	B-Application
as	O
the	O
soon-to-be-deprecated	O
Google	B-Application
Structured	B-Application
Data	I-Application
Testing	O
Tool	O
,	O
or	O
more	O
recent	O
Google	B-Application
Rich	O
Results	O
Test	O
Tool	O
,	O
Yandex	O
Microformat	B-General_Concept
validator	B-Application
,	O
and	O
Bing	B-Application
Markup	O
Validator	B-Application
can	O
be	O
used	O
to	O
test	O
the	O
validity	O
of	O
the	O
data	O
marked	O
up	O
with	O
the	O
schemas	O
and	O
Microdata	B-General_Concept
.	O
</s>
<s>
More	O
recently	O
,	O
Google	B-Application
Search	I-Application
Console	I-Application
(	O
formerly	O
webmaster	O
tools	O
)	O
has	O
provided	O
a	O
report	O
section	O
for	O
unparsable	O
structured	B-Application
data	I-Application
.	O
</s>
<s>
Some	O
schema	O
markups	O
such	O
as	O
Organization	O
and	O
Person	O
are	O
commonly	O
used	O
to	O
influence	O
search	B-Application
results	I-Application
returned	O
by	O
Google	B-Application
's	I-Application
Knowledge	I-Application
Graph	I-Application
.	O
</s>
<s>
The	O
following	O
is	O
an	O
example	O
of	O
how	O
to	O
mark	O
up	O
information	O
about	O
a	O
movie	O
and	O
its	O
director	O
using	O
the	O
Schema.org	B-Application
schemas	O
and	O
microdata	B-General_Concept
.	O
</s>
