<s>
ConTeXt	O
is	O
a	O
general-purpose	O
document	B-Application
processor	I-Application
.	O
</s>
<s>
Like	O
LaTeX	B-Application
,	O
it	O
is	O
derived	O
from	O
TeX	B-Application
.	O
</s>
<s>
It	O
is	O
based	O
in	O
part	O
on	O
the	O
TeX	B-Application
typesetting	O
system	O
,	O
and	O
uses	O
a	O
document	O
markup	O
language	O
for	O
manuscript	O
preparation	O
.	O
</s>
<s>
It	O
gives	O
the	O
user	O
extensive	O
control	O
over	O
formatting	O
while	O
making	O
it	O
easy	O
to	O
create	O
new	O
layouts	O
and	O
styles	O
without	O
learning	O
the	O
low-level	O
TeX	B-Application
macro	I-Application
language	O
.	O
</s>
<s>
ConTeXt	O
may	O
be	O
compared	O
and	O
contrasted	O
with	O
LaTeX	B-Application
,	O
but	O
the	O
primary	O
thrust	O
of	O
the	O
two	O
are	O
rather	O
distinct	O
.	O
</s>
<s>
The	O
original	O
vision	O
of	O
LaTeX	B-Application
is	O
to	O
insulate	O
the	O
user	O
from	O
typographical	O
decisions	O
—	O
a	O
useful	O
approach	O
for	O
submitting	O
e.g.	O
</s>
<s>
LaTeX	B-Application
has	O
evolved	O
from	O
that	O
original	O
vision	O
;	O
at	O
the	O
same	O
time	O
,	O
ConTeXt	O
's	O
unified	O
design	O
avoids	O
the	O
package	O
clashes	O
that	O
can	O
happen	O
with	O
LaTeX	B-Application
.	O
</s>
<s>
It	O
also	O
allows	O
the	O
user	O
to	O
use	O
different	O
TeX	B-Application
engines	O
like	O
pdfTeX	B-Language
,	O
XeTeX	B-Application
,	O
and	O
LuaTeX	B-Language
without	O
changing	O
the	O
user	O
interface	O
.	O
</s>
<s>
As	O
its	O
native	O
drawing	O
engine	O
,	O
ConTeXt	O
integrates	O
a	O
superset	O
of	O
MetaPost	B-Language
called	O
MetaFun	O
,	O
which	O
allows	O
the	O
users	O
to	O
use	O
the	O
drawing	O
abilities	O
of	O
MetaPost	B-Language
for	O
page	O
backgrounds	O
and	O
ornaments	O
.	O
</s>
<s>
Metafun	O
can	O
also	O
be	O
used	O
with	O
stand	O
alone	O
MetaPost	B-Language
.	O
</s>
<s>
ConTeXt	O
also	O
supports	O
the	O
use	O
of	O
other	O
external	O
drawing	O
engines	O
,	O
like	O
PGF/TikZ	B-Operating_System
and	O
PSTricks	O
.	O
</s>
<s>
ConTeXt	O
also	O
provides	O
a	O
macro	O
package	O
for	O
typesetting	O
chemical	O
structure	O
diagrams	O
with	O
TeX	B-Application
called	O
,	O
as	O
well	O
as	O
many	O
other	O
modules	O
.	O
</s>
<s>
This	O
package	O
can	O
also	O
be	O
used	O
with	O
plain	B-Application
TeX	I-Application
and	O
LaTeX	B-Application
.	O
</s>
<s>
ConTeXt	O
is	O
free	B-Application
software	I-Application
:	O
the	O
program	O
code	O
(	O
i.e.	O
</s>
<s>
anything	O
not	O
under	O
the	O
/doc	O
subtree	O
)	O
is	O
distributed	O
under	O
the	O
GNU	B-License
GPL	I-License
;	O
the	O
documentation	O
is	O
provided	O
under	O
Creative	O
Commons	O
Attribution	O
NonCommercial	O
ShareAlike	O
license	O
.	O
</s>
<s>
The	O
ConTeXt	O
(	O
2001	O
)	O
and	O
ConTeXt	O
(	O
1999	O
)	O
are	O
documents	O
copyrighted	O
by	O
Pragma	O
,	O
but	O
there	O
is	O
a	O
repository	O
of	O
the	O
future	O
new	O
manual	O
released	O
under	O
the	O
GNU	B-Application
Free	I-Application
Documentation	I-Application
License	I-Application
.	O
</s>
<s>
Previously	O
,	O
MkIV	O
used	O
LuaTeX	B-Language
and	O
MkII	O
used	O
pdfTeX	B-Language
.	O
</s>
<s>
Around	O
1996	O
,	O
Hans	O
Hagen	O
coined	O
the	O
name	O
ConTeXt	O
meaning	O
"	O
text	O
with	O
tex	B-Application
"	O
(	O
con-tex-t	O
;	O
"	O
con	O
"	O
is	O
a	O
Latin	O
preposition	O
meaning	O
"	O
together	O
with	O
"	O
)	O
.	O
</s>
<s>
The	O
result	O
of	O
this	O
process	O
is	O
a	O
PDF	B-Application
file	I-Application
(	O
ConTeXt	O
also	O
can	O
generate	O
a	O
DVI	B-Application
file	O
)	O
.	O
</s>
<s>
ConTeXt	O
documents	O
come	O
with	O
the	O
file	O
extension	O
.tex	B-Application
or	O
an	O
extension	O
demarking	O
the	O
version	O
required	O
:	O
.mkii	O
,	O
.mkiv	O
,	O
or	O
.mkxl	O
for	O
regular	O
TeX	B-Application
,	O
.mkvi	O
or	O
.mklx	O
for	O
a	O
dialect	O
that	O
supports	O
named	O
macro	O
parameters	O
in	O
addition	O
to	O
TeX	B-Application
’s	O
numeric	O
ones	O
.	O
</s>
<s>
\TEX\	O
typesetting	O
program	O
.	O
</s>
<s>
to	O
\LATEX	O
.	O
</s>
