<s>
The	O
Common	B-Application
Development	I-Application
and	I-Application
Distribution	I-Application
License	I-Application
(	O
CDDL	B-Application
)	O
is	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
license	O
,	O
produced	O
by	O
Sun	O
Microsystems	O
,	O
based	O
on	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
(	O
MPL	B-License
)	O
.	O
</s>
<s>
Files	O
licensed	O
under	O
the	O
CDDL	B-Application
can	O
be	O
combined	O
with	O
files	O
licensed	O
under	O
other	O
licenses	O
,	O
whether	O
open	B-Application
source	I-Application
or	O
proprietary	O
.	O
</s>
<s>
In	O
2005	O
the	O
Open	B-Application
Source	I-Application
Initiative	O
approved	O
the	O
license	O
.	O
</s>
<s>
The	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
(	O
FSF	O
)	O
considers	O
it	O
a	O
free	B-License
software	I-License
license	I-License
,	O
but	O
one	O
which	O
is	O
incompatible	O
with	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
Derived	O
from	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
1.1	O
,	O
the	O
CDDL	B-Application
tries	O
to	O
address	O
some	O
of	O
the	O
problems	O
of	O
the	O
MPL	B-License
.	O
</s>
<s>
Like	O
the	O
MPL	B-License
,	O
the	O
CDDL	B-Application
is	O
a	O
weak	O
copyleft	B-License
license	I-License
in-between	O
GPL	B-License
license	I-License
and	O
BSD/MIT	O
permissive	B-License
licenses	I-License
,	O
requiring	O
only	O
source	O
code	O
files	O
under	O
CDDL	B-Application
to	O
remain	O
under	O
CDDL	B-Application
.	O
</s>
<s>
Unlike	O
strong	O
copyleft	B-License
licenses	I-License
like	O
the	O
GPL	B-License
,	O
mixing	O
of	O
CDDL	B-Application
licensed	O
source	O
code	O
files	O
with	O
source	O
code	O
files	O
under	O
other	O
licenses	O
is	O
permitted	O
without	O
relicensing	O
.	O
</s>
<s>
The	O
resulting	O
compiled	O
software	O
product	O
(	O
"	O
binary	O
"	O
)	O
can	O
be	O
licensed	O
and	O
sold	O
under	O
a	O
different	O
license	O
,	O
as	O
long	O
as	O
the	O
source	O
code	O
is	O
still	O
available	O
under	O
CDDL	B-Application
,	O
which	O
should	O
enable	O
more	O
commercial	O
business	O
cases	O
,	O
according	O
to	O
Sun	O
.	O
</s>
<s>
Like	O
the	O
MPL	B-License
the	O
CDDL	B-Application
includes	O
a	O
patent	O
grant	O
to	O
the	O
licensee	O
from	O
all	O
contributors	O
(	O
"	O
patent	O
peace	O
"	O
)	O
.	O
</s>
<s>
The	O
previous	O
software	B-License
license	I-License
used	O
by	O
Sun	O
for	O
its	O
open	B-Application
source	I-Application
projects	O
was	O
the	O
Sun	B-License
Public	I-License
License	I-License
(	O
SPL	B-License
)	O
,	O
also	O
derived	O
from	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
.	O
</s>
<s>
The	O
CDDL	B-Application
license	O
is	O
considered	O
by	O
Sun	O
(	O
now	O
Oracle	B-Application
)	O
to	O
be	O
SPL	B-License
version	O
2	O
.	O
</s>
<s>
The	O
CDDL	B-Application
was	O
developed	O
by	O
a	O
Sun	O
Microsystems	O
team	O
(	O
among	O
them	O
Solaris	B-Application
kernel	I-Application
engineer	O
Andrew	O
Tucker	O
and	O
Claire	O
Giordano	O
)	O
,	O
based	O
on	O
the	O
MPL	B-License
version	O
1.1	O
.	O
</s>
<s>
On	O
December	O
1	O
,	O
2004	O
the	O
CDDL	B-Application
was	O
submitted	O
for	O
approval	O
to	O
the	O
Open	B-Application
Source	I-Application
Initiative	O
and	O
was	O
approved	O
as	O
an	O
open	B-Application
source	I-Application
license	O
in	O
mid	O
January	O
2005	O
.	O
</s>
<s>
The	O
second	O
CDDL	B-Application
proposal	O
,	O
submitted	O
in	O
early	O
January	O
2005	O
,	O
includes	O
some	O
corrections	O
that	O
prevent	O
the	O
CDDL	B-Application
from	O
being	O
in	O
conflict	O
with	O
European	O
Copyright	O
law	O
and	O
to	O
allow	O
single	O
developers	O
to	O
use	O
the	O
CDDL	B-Application
for	O
their	O
work	O
.	O
</s>
<s>
In	O
2006	O
,	O
in	O
the	O
first	O
draft	O
of	O
the	O
OSI	O
's	O
license	B-License
proliferation	I-License
committee	O
report	O
,	O
the	O
CDDL	B-Application
is	O
one	O
of	O
nine	O
preferred	O
licenses	O
listed	O
as	O
popular	O
,	O
widely	O
used	O
,	O
or	O
with	O
strong	O
communities	O
.	O
</s>
<s>
While	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
(	O
FSF	O
)	O
also	O
considered	O
the	O
CDDL	B-Application
a	O
free	B-License
software	I-License
license	I-License
,	O
they	O
saw	O
some	O
incompatibilities	O
with	O
their	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
The	O
question	O
of	O
whether	O
and	O
when	O
both	O
licenses	O
are	O
incompatible	O
sparked	O
debates	O
in	O
the	O
free	B-Application
software	I-Application
domain	O
in	O
2004	O
to	O
2006	O
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
FSF	O
considered	O
the	O
CDDL	B-Application
incompatible	O
to	O
their	O
GPL	B-License
license	I-License
,	O
without	O
going	O
into	O
detail	O
until	O
2016	O
.	O
</s>
<s>
CDDL	B-Application
is	O
one	O
of	O
several	O
Open	B-Application
Source	I-Application
Licenses	O
which	O
are	O
incompatible	O
with	O
GPL	B-License
.	O
</s>
<s>
This	O
characteristics	O
was	O
inherited	O
from	O
the	O
MPL	B-License
1.1	I-License
(	O
fixed	O
with	O
the	O
MPL	B-License
2.0	I-License
according	O
to	O
the	O
FSF	O
)	O
and	O
results	O
from	O
a	O
complex	O
interaction	O
of	O
several	O
clauses	O
;	O
the	O
root	O
of	O
the	O
problem	O
being	O
GPL	B-License
virality	O
,	O
similar	O
to	O
other	O
cases	O
of	O
GPL	B-License
incompatibility	O
.	O
</s>
<s>
Some	O
people	O
argue	O
that	O
Sun	O
(	O
or	O
the	O
Sun	O
engineer	O
)	O
as	O
creator	O
of	O
the	O
license	O
made	O
the	O
CDDL	B-Application
intentionally	O
GPL	B-License
incompatible	O
.	O
</s>
<s>
According	O
to	O
Danese	O
Cooper	O
one	O
of	O
the	O
reasons	O
for	O
basing	O
the	O
CDDL	B-Application
on	O
the	O
Mozilla	B-License
license	I-License
was	O
that	O
the	O
Mozilla	B-License
license	I-License
is	O
GPL-incompatible	O
.	O
</s>
<s>
Cooper	O
stated	O
,	O
at	O
the	O
6th	O
annual	O
Debian	O
conference	O
,	O
that	O
the	O
engineers	O
who	O
had	O
written	O
the	O
Solaris	B-Application
kernel	I-Application
requested	O
that	O
the	O
license	O
of	O
OpenSolaris	B-Operating_System
be	O
GPL-incompatible	O
.	O
</s>
<s>
Simon	B-Language
Phipps	I-Language
(	O
Sun	O
's	O
Chief	O
Open	B-Application
Source	I-Application
Officer	O
at	O
the	O
time	O
)	O
,	O
who	O
had	O
introduced	O
Cooper	O
as	O
"	O
the	O
one	O
who	O
actually	O
wrote	O
the	O
CDDL	B-Application
"	O
,	O
did	O
not	O
immediately	O
comment	O
,	O
but	O
later	O
in	O
the	O
same	O
video	O
,	O
he	O
says	O
,	O
referring	O
back	O
to	O
the	O
license	O
issue	O
,	O
"	O
I	O
actually	O
disagree	O
with	O
Danese	O
to	O
some	O
degree	O
"	O
,	O
while	O
describing	O
the	O
strong	O
preference	O
among	O
the	O
engineers	O
who	O
wrote	O
the	O
code	O
for	O
a	O
BSD-like	B-License
license	I-License
,	O
which	O
was	O
in	O
conflict	O
with	O
Sun	O
's	O
preference	O
for	O
something	O
copyleft	B-License
,	O
and	O
that	O
waiting	O
for	O
legal	O
clearance	O
to	O
release	O
some	O
parts	O
of	O
the	O
code	O
under	O
the	O
then	O
unreleased	O
GNU	B-License
GPL	I-License
v3	O
would	O
have	O
taken	O
several	O
years	O
,	O
and	O
would	O
probably	O
also	O
have	O
involved	O
mass	O
resignations	O
from	O
engineers	O
(	O
unhappy	O
with	O
either	O
the	O
delay	O
,	O
the	O
GPL	B-License
,	O
or	O
both	O
—	O
this	O
is	O
not	O
clear	O
from	O
the	O
video	O
)	O
.	O
</s>
<s>
Similarly	O
,	O
Bryan	O
Cantrill	O
,	O
who	O
was	O
on	O
Sun	O
at	O
that	O
time	O
and	O
involved	O
in	O
the	O
release	O
of	O
CDDL	B-Application
licensed	O
software	O
stated	O
in	O
2015	O
that	O
he	O
and	O
his	O
colleagues	O
expected	O
in	O
2006	O
the	O
fast	O
emergence	O
of	O
CDDL	B-Application
licensed	O
software	O
into	O
the	O
Linux	O
ecosystem	O
and	O
the	O
CDDL	B-Application
being	O
not	O
an	O
obstacle	O
.	O
</s>
<s>
The	O
GPL	B-License
compatibility	O
question	O
was	O
also	O
the	O
source	O
of	O
a	O
controversy	O
behind	O
a	O
partial	O
relicensing	O
of	O
cdrtools	B-Language
to	O
the	O
CDDL	B-Application
which	O
had	O
been	O
previously	O
all	O
GPL	B-License
.	O
</s>
<s>
In	O
2006	O
,	O
the	O
Debian	O
project	O
declared	O
the	O
cdrtools	B-Language
legally	O
undistributable	O
because	O
the	O
build	B-Application
system	I-Application
was	O
licensed	O
under	O
the	O
CDDL	B-Application
.	O
</s>
<s>
The	O
author	O
,	O
Jörg	B-Language
Schilling	I-Language
,	O
claimed	O
that	O
smake	O
is	O
an	O
independent	O
project	O
and	O
does	O
not	O
violate	O
the	O
GPLv3	O
.	O
</s>
<s>
Schilling	O
also	O
argued	O
that	O
even	O
though	O
the	O
GPL	B-License
requires	O
all	O
scripts	O
required	O
to	O
build	O
the	O
work	O
to	O
be	O
licensed	O
freely	O
,	O
they	O
do	O
not	O
necessarily	O
have	O
to	O
be	O
under	O
the	O
GPL	B-License
.	O
</s>
<s>
He	O
also	O
argued	O
that	O
in	O
"	O
combined	O
works	O
"	O
(	O
in	O
contrast	O
to	O
"	O
derived	O
works	O
"	O
)	O
GPL	B-License
and	O
CDDL	B-Application
licensed	O
code	O
is	O
compatible	O
.	O
</s>
<s>
Red	O
Hat	O
's	O
attorneys	O
have	O
prevented	O
cdrtools	B-Language
from	O
being	O
in	O
Fedora	O
or	O
Red	O
Hat	O
Enterprise	O
Linux	O
,	O
arguing	O
that	O
Schilling	O
has	O
an	O
"	O
unorthodox	O
"	O
view	O
of	O
copyright	O
law	O
that	O
is	O
n't	O
shared	O
by	O
their	O
legal	O
counsel	O
or	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
In	O
2015	O
,	O
the	O
CDDL	B-Application
to	O
GPL	B-License
compatibility	O
question	O
reemerged	O
when	O
Ubuntu	B-Operating_System
announced	O
inclusion	O
of	O
OpenZFS	B-Operating_System
by	O
default	O
.	O
</s>
<s>
In	O
2016	O
Ubuntu	B-Operating_System
announced	O
that	O
a	O
legal	O
review	O
resulted	O
in	O
the	O
conclusion	O
that	O
it	O
is	O
legally	O
acceptable	O
to	O
use	O
ZFS	B-Application
as	O
binary	O
kernel	B-Application
module	I-Application
in	O
Linux	O
.	O
</s>
<s>
Others	O
followed	O
Ubuntu	B-Operating_System
's	O
conclusion	O
,	O
for	O
instance	O
James	O
E	O
.	O
J	O
.	O
Bottomley	O
argued	O
there	O
can	O
not	O
be	O
"	O
a	O
convincing	O
theory	O
of	O
harm	O
"	O
developed	O
,	O
making	O
it	O
impossible	O
to	O
bring	O
the	O
case	O
to	O
court	O
.	O
</s>
<s>
Eben	O
Moglen	O
,	O
co-author	O
of	O
the	O
GPLv3	O
and	O
founder	O
of	O
the	O
SFLC	O
,	O
argued	O
that	O
while	O
the	O
letters	O
of	O
the	O
GPL	B-License
might	O
be	O
violated	O
,	O
the	O
spirit	O
of	O
both	O
licenses	O
is	O
unharmed	O
,	O
which	O
would	O
be	O
the	O
relevant	O
aspect	O
in	O
court	O
.	O
</s>
<s>
The	O
SFLC	O
mentioned	O
also	O
that	O
a	O
precedent	O
exists	O
with	O
the	O
Andrew	B-Application
File	I-Application
System	I-Application
's	O
kernel	B-Application
module	I-Application
,	O
which	O
is	O
not	O
considered	O
a	O
derivative	O
work	O
of	O
the	O
kernel	O
by	O
the	O
kernel	O
developers	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
Bradley	O
M	O
.	O
Kuhn	O
and	O
attorney	O
Karen	O
M	O
.	O
Sandler	O
from	O
the	O
Software	O
Freedom	O
Conservancy	O
argued	O
that	O
Ubuntu	B-Operating_System
would	O
violate	O
both	O
licenses	O
,	O
as	O
a	O
binary	O
ZFS	B-Application
module	B-Application
would	O
be	O
a	O
derivative	O
work	O
of	O
the	O
kernel	O
,	O
and	O
announced	O
their	O
intent	O
to	O
clarify	O
this	O
question	O
,	O
even	O
by	O
court	O
.	O
</s>
<s>
In	O
April	O
2016	O
,	O
the	O
Ubuntu	B-Operating_System
16.04LTS	O
release	O
included	O
the	O
CDDL-licensed	O
ZFS	B-Application
on	O
Linux	O
.	O
</s>
<s>
Example	O
projects	O
released	O
under	O
CDDL	B-Application
:	O
</s>
