<s>
GrGen.NET	O
is	O
a	O
software	B-Application
development	I-Application
tool	I-Application
that	O
offers	O
programming	O
languages	O
(	O
domain-specific	B-Language
languages	I-Language
)	O
that	O
are	O
optimized	O
for	O
the	O
processing	O
of	O
graph	B-Application
structured	I-Application
data	O
.	O
</s>
<s>
The	O
core	O
of	O
the	O
languages	O
consists	O
of	O
modular	B-Architecture
graph	B-Application
rewrite	I-Application
rules	I-Application
,	O
which	O
are	O
built	O
on	O
declarative	B-Language
graph	O
pattern	O
matching	O
and	O
rewriting	O
;	O
they	O
are	O
supplemented	O
by	O
many	O
of	O
the	O
constructs	O
that	O
are	O
used	O
in	O
imperative	B-Application
and	O
object-oriented	B-Language
programming	I-Language
,	O
</s>
<s>
and	O
are	O
completed	O
with	O
language	O
devices	O
known	O
from	O
database	B-Language
query	I-Language
languages	I-Language
.	O
</s>
<s>
The	O
Graph	O
Rewrite	O
GENerator	B-Application
compiles	B-Language
the	O
languages	O
into	O
efficient	O
CLI	O
assemblies	O
(	O
via	O
C#	B-Application
-Code	O
in	O
an	O
intermediate	O
step	O
)	O
,	O
which	O
can	O
be	O
integrated	O
via	O
an	O
API	B-General_Concept
into	O
code	O
written	O
in	O
any	O
.NET-language	B-Language
.	O
</s>
<s>
GrGen	B-Application
can	O
be	O
executed	O
under	O
Windows	B-Application
and	O
Linux	B-Application
(	O
Mono	B-Application
needed	O
)	O
and	O
is	O
open	B-License
source	I-License
available	O
under	O
LGPL	B-Application
v3	O
.	O
</s>
<s>
For	O
rapid	O
prototyping	O
and	O
debugging	O
,	O
an	O
interactive	O
shell	B-Operating_System
and	O
a	O
(	O
VCG	O
-	O
)	O
graph	O
viewer	O
are	O
included	O
in	O
the	O
package	O
.	O
</s>
<s>
With	O
its	O
languages	O
and	O
its	O
visual	O
and	O
stepwise	O
debugging	O
,	O
GrGen	B-Application
allows	O
one	O
to	O
develop	O
at	O
the	O
natural	O
level	O
of	O
abstraction	B-Application
of	O
graph-based	O
representations	O
,	O
such	O
as	O
those	O
employed	O
in	O
engineering	O
,	O
model	B-Language
transformation	I-Language
,	O
computational	O
linguistics	O
,	O
or	O
compiler	B-Language
construction	O
(	O
as	O
intermediate	O
representation	O
)	O
.	O
</s>
<s>
GrGen	B-Application
increases	O
productivity	O
for	O
those	O
kinds	O
of	O
tasks	O
far	O
beyond	O
what	O
can	O
be	O
achieved	O
by	O
programming	O
in	O
a	O
traditional	O
programming	O
language	O
;	O
due	O
to	O
many	O
implemented	O
performance	O
optimizations	O
it	O
still	O
allows	O
one	O
to	O
achieve	O
high-performance	O
solutions	O
.	O
</s>
<s>
Its	O
authors	O
claim	O
that	O
the	O
system	B-Application
offers	O
the	O
highest	O
combined	O
speed	O
of	O
development	O
and	O
execution	B-General_Concept
available	O
for	O
the	O
algorithmic	O
processing	O
of	O
graph-based	O
representations	O
(	O
based	O
on	O
their	O
performance	O
regarding	O
diverse	O
tasks	O
posed	O
at	O
different	O
editions	O
of	O
the	O
Transformation	O
Tool	O
Contest	O
(	O
/GraBaTs	O
)	O
)	O
.	O
</s>
<s>
Below	O
is	O
an	O
example	O
containing	O
a	O
graph	O
model	O
and	O
rule	O
specifications	O
from	O
the	O
GrGen.NET-solution	O
to	O
the	O
posed	O
at	O
.	O
</s>
