<s>
DOT	B-Application
is	O
a	O
graph	O
description	O
language	O
.	O
</s>
<s>
DOT	B-Application
graphs	I-Application
are	O
typically	O
files	O
with	O
the	O
filename	O
extension	O
gv	O
or	O
dot	B-Application
.	O
</s>
<s>
The	O
extension	O
gv	O
is	O
preferred	O
,	O
to	O
avoid	O
confusion	O
with	O
the	O
extension	O
dot	B-Application
used	O
by	O
versions	O
of	O
Microsoft	B-Application
Word	I-Application
before	O
2007	O
.	O
</s>
<s>
Various	O
programs	O
can	O
process	O
DOT	B-Application
files	O
.	O
</s>
<s>
Some	O
,	O
such	O
as	O
dot	B-Application
,	O
neato	O
,	O
twopi	O
,	O
circo	O
,	O
fdp	O
,	O
and	O
sfdp	O
,	O
can	O
read	O
a	O
DOT	B-Application
file	B-Operating_System
and	O
render	O
it	O
in	O
graphical	O
form	O
.	O
</s>
<s>
Others	O
,	O
such	O
as	O
gvpr	O
,	O
gc	O
,	O
acyclic	O
,	O
ccomps	O
,	O
sccmap	O
,	O
and	O
tred	O
,	O
read	O
DOT	B-Application
files	O
and	O
perform	O
calculations	O
on	O
the	O
represented	O
graph	O
.	O
</s>
<s>
Finally	O
,	O
others	O
,	O
such	O
as	O
lefty	O
,	O
dotty	B-Language
,	O
and	O
grappa	O
,	O
provide	O
an	O
interactive	O
interface	O
.	O
</s>
<s>
Most	O
programs	O
are	O
part	O
of	O
the	O
Graphviz	B-Language
package	O
or	O
use	O
it	O
internally	O
.	O
</s>
<s>
At	O
its	O
simplest	O
,	O
DOT	B-Application
can	O
be	O
used	O
to	O
describe	O
an	O
undirected	O
graph	O
.	O
</s>
<s>
Similar	O
to	O
undirected	O
graphs	O
,	O
DOT	B-Application
can	O
describe	O
directed	O
graphs	O
,	O
such	O
as	O
flowcharts	B-Language
and	O
dependency	O
trees	O
.	O
</s>
<s>
Various	O
attributes	O
can	O
be	O
applied	O
to	O
graphs	O
,	O
nodes	O
and	O
edges	O
in	O
DOT	B-Application
files	O
.	O
</s>
<s>
For	O
nodes	O
and	O
edges	O
,	O
one	O
or	O
more	O
attribute	B-Application
–	I-Application
value	I-Application
pairs	I-Application
are	O
placed	O
in	O
square	O
brackets	O
( []	O
)	O
after	O
a	O
statement	O
and	O
before	O
the	O
semicolon	O
(	O
which	O
is	O
optional	O
)	O
.	O
</s>
<s>
Graph	O
attributes	O
are	O
specified	O
as	O
direct	O
attribute	B-Application
–	I-Application
value	I-Application
pairs	I-Application
under	O
the	O
graph	O
element	O
,	O
where	O
multiple	O
attributes	O
are	O
separated	O
by	O
a	O
comma	O
or	O
using	O
multiple	O
sets	O
of	O
square	O
brackets	O
,	O
while	O
node	O
attributes	O
are	O
placed	O
after	O
a	O
statement	O
containing	O
only	O
the	O
name	O
of	O
the	O
node	O
,	O
but	O
not	O
the	O
relations	O
between	O
the	O
dots	B-Application
.	O
</s>
<s>
HTML-like	O
labels	O
are	O
only	O
available	O
on	O
versions	O
of	O
Graphviz	B-Language
that	O
are	O
newer	O
than	O
mid-November	O
2003	O
,	O
in	O
particular	O
,	O
they	O
are	O
not	O
considered	O
as	O
part	O
of	O
release	O
1.10	O
.	O
</s>
<s>
Dot	B-Application
supports	O
C	O
and	O
C++	B-Language
style	O
single	O
line	O
and	O
multiple	O
line	O
comments	O
.	O
</s>
<s>
The	O
DOT	B-Application
language	I-Application
defines	O
a	O
graph	O
,	O
but	O
does	O
not	O
provide	O
facilities	O
for	O
rendering	O
the	O
graph	O
.	O
</s>
<s>
There	O
are	O
several	O
programs	O
that	O
can	O
be	O
used	O
to	O
render	O
,	O
view	O
,	O
and	O
manipulate	O
graphs	O
in	O
the	O
DOT	B-Application
language	I-Application
:	O
</s>
<s>
Graphviz	B-Language
–	O
a	O
collection	O
of	O
CLI	O
utilities	O
and	O
libraries	O
to	O
manipulate	O
and	O
render	O
graphs	O
into	O
different	O
formats	O
like	O
SVG	B-Application
,	O
PDF	B-Application
,	O
PNG	O
etc	O
.	O
</s>
<s>
Vis.jsa	O
JavaScript	B-Language
library	O
that	O
accept	O
DOT	B-Application
as	O
input	O
for	O
network	O
graphs	O
.	O
</s>
<s>
Viz.js	O
–	O
a	O
JavaScript	B-Language
port	O
of	O
Graphviz	B-Language
that	O
provides	O
a	O
simple	O
wrapper	O
for	O
using	O
it	O
in	O
the	O
browser	O
.	O
</s>
<s>
While	O
the	O
DOT	B-Application
format	O
allows	O
the	O
user	O
to	O
specify	O
layout	O
details	O
via	O
positional	O
attributes	O
,	O
most	O
tools	O
rely	O
on	O
automated	O
layout	O
algorithms	O
.	O
</s>
<s>
This	O
can	O
be	O
fixed	O
with	O
a	O
vector	B-Application
graphics	I-Application
editor	I-Application
.	O
</s>
