<s>
GNU	B-Algorithm
LibreDWG	I-Algorithm
is	O
a	O
software	B-Library
library	I-Library
programmed	O
in	O
C	B-Language
to	O
manage	O
DWG	O
computer	B-Operating_System
files	I-Operating_System
,	O
native	O
proprietary	B-Application
format	O
of	O
computer-aided	B-Application
design	I-Application
software	O
AutoCAD	B-Algorithm
.	O
</s>
<s>
It	O
aims	O
to	O
be	O
a	O
free	B-Application
software	I-Application
replacement	O
for	O
the	O
OpenDWG	O
libraries	O
.	O
</s>
<s>
The	O
project	O
is	O
managed	O
by	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
(	O
FSF	B-Operating_System
)	O
.	O
</s>
<s>
The	O
proprietary	B-Application
format	O
DWG	O
is	O
currently	O
the	O
most	O
used	O
file	O
format	O
in	O
CAD	B-Application
,	O
becoming	O
a	O
de	O
facto	O
standard	O
,	O
without	O
other	O
alternative	O
extended	O
,	O
forcing	O
many	O
users	O
to	O
use	O
this	O
software	O
in	O
a	O
dominant	O
position	O
on	O
the	O
part	O
of	O
the	O
owner	O
company	O
Autodesk	O
.	O
</s>
<s>
There	O
did	O
exist	O
the	O
OpenDWG	O
library	B-Library
(	O
later	O
named	O
"	O
Teigha	O
"	O
)	O
,	O
to	O
access	O
and	O
manipulate	O
data	O
stored	O
in	O
DWG	O
format	O
,	O
which	O
is	O
developed	O
by	O
reverse	O
engineering	O
by	O
an	O
association	O
of	O
manufacturers	O
of	O
CAD	B-Application
software	I-Application
with	O
the	O
intention	O
of	O
supporting	O
their	O
products	O
.	O
</s>
<s>
As	O
OpenDWG	O
's	O
license	O
does	O
not	O
allow	O
the	O
usage	O
in	O
free	B-Application
software	I-Application
projects	O
,	O
the	O
FSF	B-Operating_System
created	O
a	O
free	O
alternative	O
to	O
OpenDWG	O
.	O
</s>
<s>
GNU	B-Algorithm
LibreDWG	I-Algorithm
is	O
based	O
on	O
the	O
LibDWG	O
library	B-Library
,	O
originally	O
written	O
by	O
Rodrigo	O
Rodrigues	O
da	O
Silva	O
and	O
Felipe	O
Correa	O
da	O
Silva	O
Sanches	O
and	O
licensed	O
as	O
GPLv2	O
around	O
2005	O
.	O
</s>
<s>
In	O
July	O
2010	O
the	O
FSF	B-Operating_System
noted	O
the	O
creation	O
of	O
an	O
alternative	O
to	O
the	O
OpenDWG	O
library	B-Library
as	O
one	O
of	O
13	O
"	O
high	O
priority	O
projects	O
"	O
.	O
</s>
<s>
In	O
2009	O
a	O
license	O
update	O
of	O
LibDWG/LibreDWG	O
to	O
the	O
version	O
3	O
of	O
the	O
GNU	O
GPL	O
,	O
made	O
it	O
impossible	O
for	O
the	O
free	B-Application
software	I-Application
projects	O
LibreCAD	B-Language
and	O
FreeCAD	B-Language
to	O
use	O
LibreDWG	B-Algorithm
legally	O
.	O
</s>
<s>
Many	O
projects	O
voiced	O
their	O
unhappiness	O
about	O
the	O
GPLv3	O
license	O
selection	O
for	O
LibreDWG	B-Algorithm
,	O
such	O
as	O
FreeCAD	B-Language
,	O
LibreCAD	B-Language
,	O
Assimp	B-Language
,	O
and	O
Blender	B-Application
.	O
</s>
<s>
Some	O
suggested	O
the	O
selection	O
of	O
a	O
license	O
with	O
a	O
broader	O
license	O
compatibility	O
,	O
for	O
instance	O
the	O
MIT	B-License
,	O
BSD	B-Operating_System
,	O
or	O
LGPL	B-Application
2.1	I-Application
.	O
</s>
<s>
A	O
request	O
went	O
to	O
the	O
FSF	B-Operating_System
to	O
relicense	O
GNU	B-Algorithm
LibreDWG	I-Algorithm
as	O
GPLv2	O
,	O
which	O
was	O
rejected	O
in	O
2012	O
.	O
</s>
<s>
In	O
September	O
2013	O
,	O
the	O
original	O
project	O
on	O
which	O
LibreDWG	B-Algorithm
is	O
based	O
,	O
LibDWG	O
,	O
announced	O
that	O
it	O
was	O
reactivating	O
,	O
re-forking	B-Application
its	O
code	O
from	O
LibreDWG	B-Algorithm
.	O
</s>
<s>
The	O
LibreDWG	B-Algorithm
project	O
has	O
resumed	O
active	O
development	O
,	O
including	O
the	O
addition	O
of	O
more	O
recent	O
.dwg	O
and	O
.dxf	O
formats	O
with	O
version	O
0.5	O
in	O
June	O
of	O
2018	O
.	O
</s>
