<s>
Open	B-Application
ModelSphere	I-Application
is	O
a	O
data	O
,	O
process	O
and	O
UML	B-Language
modeling	O
tool	O
written	O
in	O
Java	O
and	O
distributed	O
as	O
free	B-Application
software	I-Application
under	O
the	O
GPL	B-License
License	I-License
.	O
</s>
<s>
It	O
provides	O
support	O
for	O
forward	O
and	O
reverse	O
engineering	O
between	O
UML	B-Language
and	O
relational	O
schemas	O
.	O
</s>
<s>
Open	B-Application
ModelSphere	I-Application
has	O
SILVERRUN	O
PerfectO	O
for	O
an	O
ancestor	O
,	O
proprietary	O
software	O
developed	O
by	O
Computer	O
Systems	O
Advisers	O
and	O
released	O
in	O
1996	O
.	O
</s>
<s>
Later	O
on	O
,	O
more	O
features	O
were	O
added	O
including	O
support	O
for	O
business	O
process	O
modeling	O
,	O
conceptual	O
data	O
modeling	O
,	O
and	O
UML	B-Language
diagramming	O
.	O
</s>
<s>
In	O
September	O
2008	O
,	O
Grandite	O
released	O
ModelSphere	O
's	O
core	O
application	O
as	O
an	O
open	O
source	O
product	O
based	O
on	O
the	O
GNU	B-License
Public	I-License
License	I-License
version	O
3	O
.	O
</s>
