<s>
HTML	B-Language
Tidy	I-Language
is	O
a	O
console	B-Device
application	I-Device
for	O
correcting	O
invalid	O
HyperText	B-Language
Markup	I-Language
Language	I-Language
(	O
HTML	B-Language
)	O
,	O
detecting	O
potential	O
web	O
accessibility	O
errors	O
,	O
and	O
for	O
improving	O
the	O
layout	O
and	O
indent	O
style	O
of	O
the	O
resulting	O
markup	O
.	O
</s>
<s>
It	O
is	O
also	O
a	O
cross-platform	O
library	B-Library
for	O
computer	B-Application
applications	I-Application
that	O
provides	O
HTML	B-Language
Tidy	I-Language
's	O
features	O
.	O
</s>
<s>
HTML	B-Language
Tidy	I-Language
was	O
developed	O
by	O
Dave	O
Raggett	O
of	O
the	O
World	O
Wide	O
Web	O
Consortium	O
(	O
W3C	O
)	O
.	O
</s>
<s>
Later	O
it	O
was	O
released	O
as	O
a	O
SourceForge	B-Application
project	O
in	O
2003	O
and	O
managed	O
by	O
various	O
maintainers	O
.	O
</s>
<s>
In	O
2012	O
,	O
the	O
project	O
was	O
moved	O
to	O
GitHub	B-Application
,	O
and	O
maintained	O
by	O
Michael	O
Smith	O
,	O
also	O
of	O
W3C	O
,	O
where	O
HTML5	B-Application
support	O
was	O
added	O
.	O
</s>
<s>
In	O
2015	O
,	O
the	O
HTML	B-Language
Tidy	I-Language
Advocacy	O
Community	O
Group	O
(	O
HTACG	O
)	O
was	O
formed	O
for	O
management	O
and	O
development	O
of	O
HTML	B-Language
Tidy	I-Language
as	O
a	O
W3C	O
Community	O
Group	O
.	O
</s>
<s>
HTML	B-Language
Tidy	I-Language
source	O
code	O
is	O
written	O
in	O
ANSI	O
C	B-Language
for	O
portability	O
.	O
</s>
<s>
It	O
is	O
available	O
under	O
the	O
W3C	B-License
Software	I-License
Notice	I-License
and	I-License
License	I-License
,	O
a	O
permissive	O
BSD-style	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
Up-to-date	O
versions	O
are	O
available	O
as	O
source	O
code	O
cloned	O
from	O
its	O
GitHub	B-Application
Git	B-Application
version	I-Application
control	I-Application
repository	O
,	O
or	O
in	O
binary	O
packages	O
for	O
multiple	O
operating	O
systems	O
from	O
its	O
GitHub	B-Application
Releases	O
repository	O
.	O
</s>
<s>
Examples	O
of	O
corrections	O
to	O
invalid	O
or	O
poorly	O
constructed	O
HTML	B-Language
:	O
</s>
