<s>
Enterprise	B-Architecture
engineering	I-Architecture
is	O
the	O
body	O
of	O
knowledge	O
,	O
principles	O
,	O
and	O
practices	O
used	O
to	O
design	O
all	O
or	O
part	O
of	O
an	O
enterprise	O
.	O
</s>
<s>
Enterprise	B-Architecture
engineering	I-Architecture
may	O
focus	O
on	O
the	O
design	O
of	O
the	O
enterprise	O
as	O
a	O
whole	O
,	O
or	O
on	O
the	O
design	O
and	O
integration	O
of	O
certain	O
business	O
components	O
.	O
</s>
<s>
Several	O
types	O
of	O
enterprise	B-Architecture
engineering	I-Architecture
have	O
emerged	O
.	O
</s>
<s>
In	O
engineering	O
,	O
enterprise	B-Architecture
engineering	I-Architecture
covers	O
a	O
wide	O
variety	O
of	O
activities	O
.	O
</s>
<s>
In	O
software	O
development	O
,	O
enterprise	B-Architecture
engineering	I-Architecture
deals	O
with	O
the	O
modelling	O
and	O
integration	O
of	O
various	O
organizational	O
and	O
technical	O
parts	O
of	O
business	O
processes	O
and	O
functions	O
.	O
</s>
<s>
In	O
information	O
systems	O
development	O
,	O
this	O
has	O
become	O
an	O
area	O
of	O
activity	O
for	O
the	O
organization	O
of	O
systems	O
analysis	O
,	O
and	O
an	O
extension	O
to	O
the	O
existing	O
scope	O
of	O
Information	B-Application
Modelling	I-Application
.	O
</s>
<s>
Here	O
,	O
enterprise	O
modelling	O
can	O
form	O
part	O
of	O
the	O
early	O
,	O
middle	O
and	O
late	O
information	B-General_Concept
system	I-General_Concept
development	I-General_Concept
life	I-General_Concept
cycle	I-General_Concept
.	O
</s>
<s>
Enterprise	B-Architecture
engineering	I-Architecture
involves	O
formal	O
methodologies	O
,	O
methods	O
and	O
techniques	O
which	O
are	O
designed	O
,	O
tested	O
and	O
used	O
extensively	O
in	O
order	O
to	O
offer	O
organizations	O
reusable	O
business	O
process	O
solutions	O
:	O
</s>
<s>
CIMOSA	B-Library
provides	O
templates	O
and	O
interconnected	O
modeling	O
constructs	O
to	O
encode	O
business	O
,	O
people	O
and	O
information	O
technology	O
(	O
IT	O
)	O
aspects	O
of	O
enterprise	O
requirements	O
.	O
</s>
<s>
IDEF	O
,	O
first	O
developed	O
as	O
a	O
modeling	B-Language
language	I-Language
to	O
model	O
manufacturing	O
systems	O
,	O
has	O
been	O
used	O
by	O
the	O
U.S.	O
Airforce	O
since	O
1981	O
and	O
originally	O
offered	O
four	O
different	O
notations	O
to	O
model	O
an	O
enterprise	O
from	O
a	O
certain	O
viewpoint	O
.	O
</s>
<s>
Like	O
CIMOSA	B-Library
,	O
it	O
also	O
uses	O
different	O
enterprise	O
views	O
.	O
</s>
<s>
Moreover	O
,	O
IDEF	O
can	O
be	O
easily	O
transformed	O
into	O
UML-diagrams	B-Language
for	O
the	O
further	O
development	O
of	O
IT	O
systems	O
.	O
</s>
<s>
These	O
positive	O
characteristics	O
make	O
it	O
a	O
powerful	O
method	O
for	O
the	O
development	O
of	O
Functional	B-Architecture
Software	I-Architecture
Architectures	I-Architecture
.	O
</s>
<s>
Petri	B-Operating_System
Nets	I-Operating_System
are	O
established	O
tools	O
used	O
to	O
model	O
manufacturing	O
systems	O
.	O
</s>
<s>
They	O
are	O
highly	O
expressive	O
and	O
provide	O
good	O
formalisms	O
for	O
the	O
modeling	O
of	O
concurrent	B-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
The	O
most	O
advantageous	O
properties	O
are	O
the	O
ability	O
to	O
create	O
simple	O
representation	O
of	O
states	O
,	O
concurrent	B-Operating_System
system	I-Operating_System
transitions	O
and	O
capabilities	O
thereby	O
allowing	O
modelling	O
of	O
the	O
duration	O
of	O
transitions	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
Petri	B-Operating_System
Nets	I-Operating_System
can	O
be	O
used	O
to	O
model	O
certain	O
business	O
processes	O
with	O
corresponding	O
state	O
and	O
transitions	O
or	O
activities	O
therein	O
as	O
well	O
as	O
outputs	O
.	O
</s>
<s>
Moreover	O
,	O
Petri	B-Operating_System
Nets	I-Operating_System
can	O
be	O
used	O
to	O
model	O
different	O
software	O
systems	O
and	O
transitions	O
between	O
these	O
systems	O
.	O
</s>
<s>
In	O
recent	O
years	O
research	O
has	O
shown	O
that	O
Petri	B-Operating_System
Nets	I-Operating_System
can	O
contribute	O
to	O
the	O
development	O
of	O
business	O
process	O
integration	O
.	O
</s>
<s>
The	O
correspondence	O
between	O
their	O
Model	O
Blue	O
business	O
view	O
and	O
an	O
equivalent	O
Petri	B-Operating_System
Net	I-Operating_System
is	O
also	O
shown	O
,	O
which	O
indicates	O
that	O
their	O
research	O
has	O
closed	O
the	O
gap	O
between	O
business	O
and	O
IT	O
.	O
</s>
<s>
However	O
,	O
instead	O
of	O
Petri	B-Operating_System
Nets	I-Operating_System
the	O
researchers	O
instead	O
use	O
their	O
own	O
Model	O
Blue	O
IT	O
view	O
,	O
which	O
can	O
be	O
derived	O
from	O
their	O
business	O
view	O
through	O
a	O
transformation	O
engine	O
.	O
</s>
<s>
Unified	B-Language
Modeling	I-Language
Language	I-Language
(	O
UML	B-Language
)	O
is	O
a	O
broadly	O
accepted	O
modeling	B-Language
language	I-Language
for	O
the	O
development	O
of	O
software	O
systems	O
and	O
applications	O
.	O
</s>
<s>
Many	O
within	O
the	O
Object-oriented	B-Application
analysis	I-Application
and	I-Application
design	I-Application
community	O
also	O
use	O
UML	B-Language
for	O
enterprise	O
modeling	O
purposes	O
.	O
</s>
<s>
While	O
Petri	B-Operating_System
Nets	I-Operating_System
focus	O
on	O
the	O
interaction	O
and	O
states	O
of	O
objects	O
,	O
UML	B-Language
focuses	O
more	O
on	O
the	O
business	O
objects	O
themselves	O
.	O
</s>
<s>
Sometimes	O
these	O
are	O
called	O
“	O
enterprise	O
building	B-Architecture
blocks	I-Architecture
”	O
and	O
includes	O
resources	O
,	O
processes	O
,	O
goals	O
,	O
rules	O
and	O
metamodels	O
.	O
</s>
<s>
Despite	O
the	O
fact	O
that	O
UML	B-Language
can	O
be	O
used	O
to	O
model	O
an	O
integrated	O
software	O
system	O
,	O
it	O
has	O
been	O
argued	O
that	O
the	O
reality	O
of	O
business	O
can	O
be	O
modeled	O
with	O
a	O
software	B-Language
modeling	I-Language
language	O
.	O
</s>
<s>
In	O
response	O
,	O
the	O
object	O
oriented	O
community	O
makes	O
business	O
extensions	O
for	O
UML	B-Language
and	O
adapts	O
the	O
language	O
accordingly	O
.	O
</s>
<s>
Extended	O
Enterprise	O
Modeling	B-Language
Language	I-Language
(	O
EEML	O
)	O
is	O
derived	O
from	O
UML	B-Language
and	O
is	O
proposed	O
as	O
a	O
business	O
modeling	B-Language
language	I-Language
.	O
</s>
<s>
The	O
question	O
remains	O
as	O
to	O
whether	O
this	O
business	O
transformation	O
is	O
the	O
correct	O
method	O
to	O
use	O
,	O
as	O
it	O
was	O
earlier	O
said	O
that	O
UML	B-Language
in	O
combination	O
with	O
other	O
“	O
pure’	O
business	O
methods	O
may	O
be	O
a	O
better	O
alternative	O
.	O
</s>
<s>
EFD	O
may	O
be	O
used	O
as	O
a	O
business	O
front-end	O
to	O
a	O
software	B-Language
modeling	I-Language
language	O
like	O
UML	B-Language
and	O
its	O
major	O
similarities	O
to	O
IDEF	O
as	O
a	O
modeling	O
tool	O
indicate	O
that	O
this	O
is	O
indeed	O
possible	O
.	O
</s>
<s>
However	O
,	O
further	O
research	O
is	O
needed	O
to	O
improve	O
EFD	O
techniques	O
in	O
such	O
a	O
way	O
that	O
formal	O
mappings	O
to	O
UML	B-Language
can	O
be	O
made	O
.	O
</s>
<s>
Research	O
on	O
the	O
complementary	O
use	O
of	O
IDEF	O
and	O
UML	B-Language
has	O
contributed	O
to	O
the	O
acceptance	O
of	O
IDEF	O
as	O
business-front	O
end	O
and	O
therefore	O
a	O
similar	O
study	O
should	O
be	O
carried	O
out	O
with	O
EFD	O
and	O
UML	B-Language
.	O
</s>
