<s>
The	O
Graphical	B-Language
Editing	I-Language
Framework	I-Language
(	O
GEF	O
)	O
is	O
an	O
Eclipse	B-Application
project	O
that	O
provides	O
framework	O
and	O
end-user	O
components	O
related	O
to	O
graphical	O
applications	O
.	O
</s>
<s>
GEF	O
was	O
initially	O
developed	O
as	O
part	O
of	O
IBM	O
's	O
etools	O
(	O
com.ibm.etools.gef	O
)	O
and	O
was	O
contributed	O
to	O
Eclipse	B-Application
in	O
2002	O
in	O
version	O
2.0.0	O
,	O
consisting	O
then	O
of	O
two	O
components	O
:	O
Draw2d	O
,	O
a	O
2D	O
visualization	O
component	O
based	O
on	O
the	O
Standard	B-Application
Widget	I-Application
Toolkit	I-Application
(	O
SWT	O
)	O
and	O
GEF	O
(	O
MVC	O
)	O
,	O
a	O
related	O
model-view-controller	O
framework	O
that	O
can	O
be	O
used	O
to	O
realize	O
graphical	O
editors	O
as	O
part	O
of	O
Eclipse	B-Application
Rich	O
Client	O
Platform	O
(	O
RCP	O
)	O
applications	O
.	O
</s>
<s>
The	O
first	O
release	O
at	O
Eclipse	B-Application
was	O
GEF	O
2.1.0	O
in	O
March	O
2003	O
.	O
</s>
<s>
It	O
is	O
a	O
complete	O
redesign	O
that	O
is	O
much	O
more	O
modular	O
,	O
uses	O
JavaFX	O
instead	O
of	O
SWT	O
as	O
underlying	O
rendering	O
framework	O
,	O
and	O
can	O
be	O
used	O
also	O
independently	O
of	O
Eclipse	B-Application
RCP	O
applications	O
.	O
</s>
<s>
GEF	O
3.x	O
provides	O
framework	O
technology	O
to	O
realize	O
graphical	O
editors	O
and	O
views	O
as	O
part	O
of	O
Eclipse	B-Application
Rich	O
Client	O
Platform	O
(	O
RCP	O
)	O
applications	O
.	O
</s>
<s>
While	O
graphical	O
applications	O
can	O
be	O
built	O
on	O
top	O
of	O
the	O
GEF	O
3.x	O
components	O
directly	O
,	O
Draw2d	O
and	O
GEF	O
(	O
MVC	O
)	O
are	O
also	O
used	O
by	O
the	O
Graphical	B-Language
Modeling	I-Language
Framework	I-Language
(	O
GMF	O
)	O
,	O
which	O
combines	O
them	O
with	O
the	O
Eclipse	B-Language
Modeling	I-Language
Framework	I-Language
(	O
EMF	O
)	O
to	O
create	O
the	O
code	O
for	O
both	O
the	O
data	O
model	O
and	O
the	O
graphical	O
editor	O
.	O
</s>
<s>
Finally	O
,	O
EditParts	O
evaluate	O
requests	O
and	O
create	O
the	O
appropriate	O
command	B-Language
to	O
edit	O
the	O
underlying	O
model	O
.	O
</s>
<s>
The	O
request	O
is	O
handed	O
over	O
to	O
the	O
selected	O
EditPart	O
,	O
which	O
in	O
turn	O
returns	O
a	O
Command	B-Language
.	O
</s>
<s>
The	O
capable	O
editpolicy	O
creates	O
a	O
command	B-Language
.	O
</s>
<s>
This	O
command	B-Language
is	O
handed	O
back	O
to	O
the	O
tool	O
which	O
initiated	O
the	O
"	O
Request	O
"	O
.	O
</s>
<s>
Execution	O
of	O
the	O
command	B-Language
causes	O
the	O
model	O
to	O
be	O
modified	O
(	O
Response	O
)	O
.	O
</s>
