<s>
The	O
Reciprocal	B-License
Public	I-License
License	I-License
(	O
RPL	O
)	O
is	O
a	O
copyleft	B-License
software	B-License
license	I-License
released	O
in	O
2001	O
.	O
</s>
<s>
The	O
RPL	O
was	O
authored	O
in	O
2001	O
by	O
Scott	O
Shattuck	O
,	O
a	O
software	B-Architecture
architect	I-Architecture
for	O
Technical	O
Pursuit	O
Inc	O
.	O
for	O
use	O
with	O
that	O
company	O
's	O
TIBET	O
product	O
line	O
.	O
</s>
<s>
The	O
RPL	O
was	O
inspired	O
by	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
and	O
authored	O
to	O
explicitly	O
remove	O
what	O
the	O
RPL	O
's	O
authors	O
have	O
referred	O
to	O
as	O
the	O
GPL	B-License
's	O
"	O
privacy	O
loophole	O
"	O
.	O
</s>
<s>
The	O
GPL	B-License
privacy	O
loopholes	O
allows	O
recipients	O
of	O
GPL	B-License
'd	O
code	O
to	O
:	O
</s>
<s>
Because	O
of	O
its	O
"	O
viral	O
"	O
nature	O
,	O
the	O
RPL	O
is	O
often	O
found	O
in	O
dual-licensing	B-License
models	O
in	O
which	O
it	O
is	O
paired	O
with	O
more	O
traditional	O
closed-source	O
licenses	O
.	O
</s>
<s>
However	O
,	O
because	O
of	O
its	O
requirements	O
for	O
reciprocation	O
without	O
exceptions	O
,	O
it	O
is	O
considered	O
to	O
be	O
non-free	O
by	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
The	O
license	O
is	O
used	O
by	O
Active	B-Language
Agenda	I-Language
,	O
a	O
risk-management	O
web	O
application	O
,	O
and	O
,	O
an	O
asynchronous	O
messaging	O
library	O
for	O
the	O
.NET/Mono	O
platform	O
.	O
</s>
<s>
The	O
RPL	O
and	O
GPL	B-License
are	O
used	O
by	O
OPC	O
Foundation	O
under	O
the	O
dual-licence	B-License
scheme	O
,	O
where	O
the	O
former	O
is	O
used	O
for	O
members	O
and	O
the	O
latter	O
for	O
non-members	O
.	O
</s>
