<s>
The	O
Theory	B-General_Concept
of	I-General_Concept
regions	I-General_Concept
is	O
an	O
approach	O
for	O
synthesizing	O
a	O
Petri	B-Operating_System
net	I-Operating_System
from	O
a	O
transition	B-Application
system	I-Application
.	O
</s>
<s>
Theory	B-General_Concept
of	I-General_Concept
regions	I-General_Concept
handles	O
elementary	O
net	O
systems	O
as	O
well	O
as	O
P/T	O
nets	O
and	O
other	O
kinds	O
of	O
nets	O
.	O
</s>
<s>
An	O
important	O
point	O
is	O
that	O
the	O
approach	O
is	O
aimed	O
at	O
the	O
synthesis	O
of	O
unlabeled	O
Petri	B-Operating_System
nets	I-Operating_System
only	O
.	O
</s>
<s>
A	O
region	O
of	O
a	O
transition	B-Application
system	I-Application
is	O
a	O
mapping	O
assigning	O
to	O
each	O
state	O
a	O
number	O
(	O
natural	O
number	O
for	O
P/T	O
nets	O
,	O
binary	O
for	O
ENS	O
)	O
and	O
to	O
each	O
transition	O
label	O
a	O
number	O
such	O
that	O
consistency	O
conditions	O
holds	O
whenever	O
.	O
</s>
<s>
Each	O
region	O
represents	O
a	O
potential	O
place	O
of	O
a	O
Petri	B-Operating_System
net	I-Operating_System
.	O
</s>
