<s>
hgsubversion	B-Language
is	O
an	O
extension	O
for	O
Mercurial	B-Protocol
that	O
allows	O
using	O
Mercurial	B-Protocol
as	O
a	O
Subversion	B-Application
client	O
.	O
</s>
<s>
It	O
has	O
been	O
chosen	O
by	O
the	O
Python	B-Language
developers	O
as	O
the	O
preferred	O
method	O
for	O
transitioning	O
from	O
Subversion	B-Application
to	O
Mercurial	B-Protocol
as	O
their	O
version	B-Architecture
control	I-Architecture
system	I-Architecture
,	O
once	O
it	O
is	O
production	O
quality	O
.	O
</s>
<s>
hgsubversion	B-Language
was	O
initially	O
written	O
by	O
Augie	O
Fackler	O
and	O
has	O
been	O
publicly	O
developed	O
since	O
September	O
2008	O
.	O
</s>
<s>
It	O
is	O
distributed	O
under	O
the	O
GPL	B-License
version	O
2	O
and	O
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
.	O
</s>
