<s>
JetBrains	B-Application
MPS	I-Application
(	O
Meta	O
Programming	O
System	O
)	O
is	O
a	O
language	B-Application
workbench	I-Application
developed	O
by	O
JetBrains	O
.	O
</s>
<s>
MPS	O
is	O
a	O
tool	O
to	O
design	O
domain-specific	B-Language
languages	I-Language
(	O
DSL	O
)	O
.	O
</s>
<s>
It	O
uses	O
projectional	B-Application
editing	I-Application
which	O
allows	O
users	O
to	O
overcome	O
the	O
limits	O
of	O
language	O
parsers	O
,	O
and	O
build	O
DSL	O
editors	O
,	O
such	O
as	O
ones	O
with	O
tables	O
and	O
diagrams	O
.	O
</s>
<s>
It	O
implements	O
language-oriented	B-Application
programming	I-Application
.	O
</s>
<s>
MPS	O
is	O
an	O
environment	O
for	O
language	O
definition	O
,	O
a	O
language	B-Application
workbench	I-Application
,	O
and	O
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
for	O
such	O
languages	O
.	O
</s>
<s>
Developers	O
from	O
different	O
domains	O
can	O
benefit	O
from	O
domain-specific	B-Language
language	I-Language
extensions	O
in	O
general-purpose	O
programming	O
languages	O
.	O
</s>
<s>
For	O
example	O
,	O
Java	B-Language
developers	O
working	O
with	O
financial	O
applications	O
might	O
benefit	O
from	O
built-in	O
support	O
of	O
monetary	O
values	O
.	O
</s>
<s>
For	O
example	O
,	O
if	O
Java	B-Language
is	O
extended	O
with	O
a	O
better	O
syntax	O
for	O
collections	O
and	O
then	O
again	O
extended	O
with	O
a	O
better	O
syntax	O
for	O
dates	O
,	O
these	O
extensions	O
will	O
work	O
well	O
together	O
.	O
</s>
<s>
MPS	O
solves	O
grammar	O
ambiguity	O
issues	O
by	O
working	O
with	O
the	O
abstract	B-Data_Structure
syntax	I-Data_Structure
tree	I-Data_Structure
directly	O
.	O
</s>
<s>
In	O
order	O
to	O
edit	O
such	O
a	O
tree	O
,	O
a	O
text-like	O
projectional	B-Application
editor	I-Application
is	O
used	O
.	O
</s>
<s>
Base	O
Language	O
-	O
99%	O
Java	B-Language
reimplemented	O
with	O
MPS	O
.	O
</s>
<s>
and	O
formal	B-Architecture
methods	I-Architecture
:	O
</s>
<s>
In	O
October	O
2009	O
,	O
JetBrains	O
released	O
the	O
YouTrack	B-Language
bug	O
tracking	O
system	O
-	O
the	O
first	O
commercial	O
software	O
product	O
developed	O
with	O
MPS	O
.	O
</s>
<s>
GDF	O
consists	O
of	O
domain-specific	B-Language
languages	I-Language
allowing	O
for	O
stepwise	O
refinement	O
of	O
application	O
definitions	O
,	O
from	O
higher	O
levels	O
of	O
abstraction	O
towards	O
implementation	O
code	O
to	O
be	O
run	O
on	O
a	O
gamification	O
engine	O
.	O
</s>
<s>
The	O
MPS	O
source	O
code	O
is	O
released	O
under	O
the	O
Apache	B-Application
License	I-Application
.	O
</s>
