<s>
The	O
Systems	B-Language
Modeling	I-Language
Language	I-Language
(	O
SysML	B-Language
)	O
is	O
a	O
general-purpose	B-General_Concept
modeling	I-General_Concept
language	I-General_Concept
for	O
systems	O
engineering	O
applications	O
.	O
</s>
<s>
It	O
supports	O
the	O
specification	O
,	O
analysis	O
,	O
design	O
,	O
verification	B-Application
and	I-Application
validation	I-Application
of	O
a	O
broad	O
range	O
of	O
systems	O
and	O
systems-of-systems	O
.	O
</s>
<s>
SysML	B-Language
was	O
originally	O
developed	O
by	O
an	O
open	B-License
source	I-License
specification	O
project	O
,	O
and	O
includes	O
an	O
open	B-License
source	I-License
license	O
for	O
distribution	O
and	O
use	O
.	O
</s>
<s>
SysML	B-Language
is	O
defined	O
as	O
an	O
extension	O
of	O
a	O
subset	O
of	O
the	O
Unified	B-Language
Modeling	I-Language
Language	I-Language
(	O
UML	B-Language
)	O
using	O
UML	B-Language
's	I-Language
profile	I-Language
mechanism	I-Language
.	O
</s>
<s>
SysML	B-Language
offers	O
several	O
systems	O
engineering	O
specific	O
improvements	O
over	O
UML	B-Language
,	O
which	O
has	O
been	O
developed	O
as	O
a	O
software	O
modeling	O
language	O
.	O
</s>
<s>
SysML	B-Language
's	O
diagrams	O
express	O
system	O
engineering	O
concepts	O
better	O
due	O
to	O
the	O
removal	O
of	O
UML	B-Language
's	O
software-centric	O
restrictions	O
and	O
adds	O
two	O
new	O
diagram	O
types	O
,	O
requirement	O
and	O
parametric	O
diagrams	O
.	O
</s>
<s>
Consequent	O
to	O
these	O
enhancements	O
,	O
SysML	B-Language
is	O
able	O
to	O
model	O
a	O
wide	O
range	O
of	O
systems	O
,	O
which	O
may	O
include	O
hardware	O
,	O
software	O
,	O
information	O
,	O
processes	O
,	O
personnel	O
,	O
and	O
facilities	O
.	O
</s>
<s>
SysML	B-Language
is	O
a	O
comparatively	O
small	O
language	O
that	O
is	O
easier	O
to	O
learn	O
and	O
apply	O
.	O
</s>
<s>
Since	O
SysML	B-Language
removes	O
many	O
of	O
UML	B-Language
's	O
software-centric	O
constructs	O
,	O
the	O
overall	O
language	O
is	O
smaller	O
both	O
in	O
diagram	O
types	O
and	O
total	O
constructs	O
.	O
</s>
<s>
SysML	B-Language
allocation	O
tables	O
support	O
common	O
kinds	O
of	O
allocations	O
.	O
</s>
<s>
Whereas	O
UML	B-Language
provides	O
only	O
limited	O
support	O
for	O
tabular	O
notations	O
,	O
SysML	B-Language
furnishes	O
flexible	O
allocation	O
tables	O
that	O
support	O
requirements	O
allocation	O
,	O
functional	O
allocation	O
,	O
and	O
structural	O
allocation	O
.	O
</s>
<s>
This	O
capability	O
facilitates	O
automated	O
verification	B-Application
and	I-Application
validation	I-Application
(	O
V&V	O
)	O
and	O
gap	O
analysis	O
.	O
</s>
<s>
SysML	B-Language
model	O
management	O
constructs	O
support	O
models	O
,	O
views	O
,	O
and	O
viewpoints	O
.	O
</s>
<s>
These	O
constructs	O
extend	O
UML	B-Language
's	O
capabilities	O
and	O
are	O
architecturally	O
aligned	O
with	O
IEEE-Std-1471-2000	B-Architecture
(	O
IEEE	O
Recommended	O
Practice	O
for	O
Architectural	O
Description	O
of	O
Software	O
Intensive	O
Systems	O
)	O
.	O
</s>
<s>
SysML	B-Language
reuses	O
seven	O
of	O
UML	B-Language
2	I-Language
's	O
fourteen	O
diagrams	O
,	O
and	O
adds	O
two	O
diagrams	O
(	O
requirement	O
and	O
parametric	O
diagrams	O
)	O
for	O
a	O
total	O
of	O
nine	O
diagram	O
types	O
.	O
</s>
<s>
SysML	B-Language
also	O
supports	O
allocation	O
tables	O
,	O
a	O
tabular	O
format	O
that	O
can	O
be	O
dynamically	O
derived	O
from	O
SysML	B-Language
allocation	O
relationships	O
.	O
</s>
<s>
A	O
table	O
which	O
compares	O
SysML	B-Language
and	O
UML	B-Language
2	I-Language
diagrams	O
is	O
available	O
in	O
the	O
SysML	B-Language
FAQ	O
.	O
</s>
<s>
Consider	O
modeling	O
an	O
automotive	O
system	O
:	O
with	O
SysML	B-Language
one	O
can	O
use	O
Requirement	O
diagrams	O
to	O
efficiently	O
capture	O
functional	O
,	O
performance	O
,	O
and	O
interface	O
requirements	O
,	O
whereas	O
with	O
UML	B-Language
one	O
is	O
subject	O
to	O
the	O
limitations	O
of	O
use	B-Language
case	I-Language
diagrams	I-Language
to	O
define	O
high-level	O
functional	O
requirements	O
.	O
</s>
<s>
Likewise	O
,	O
with	O
SysML	B-Language
one	O
can	O
use	O
Parametric	O
diagrams	O
to	O
precisely	O
define	O
performance	O
and	O
quantitative	O
constraints	O
like	O
maximum	O
acceleration	O
,	O
minimum	O
curb	O
weight	O
,	O
and	O
total	O
air	O
conditioning	O
capacity	O
.	O
</s>
<s>
UML	B-Language
provides	O
no	O
straightforward	O
mechanism	O
to	O
capture	O
this	O
sort	O
of	O
essential	O
performance	O
and	O
quantitative	O
information	O
.	O
</s>
<s>
Concerning	O
the	O
rest	O
of	O
the	O
automotive	O
system	O
,	O
enhanced	O
activity	O
diagrams	O
and	O
state	B-Application
machine	I-Application
diagrams	I-Application
can	O
be	O
used	O
to	O
specify	O
the	O
embedded	B-Application
software	I-Application
control	O
logic	O
and	O
information	O
flows	O
for	O
the	O
on-board	O
automotive	O
computers	O
.	O
</s>
<s>
Other	O
SysML	B-Language
structural	O
and	O
behavioral	O
diagrams	O
can	O
be	O
used	O
to	O
model	O
factories	O
that	O
build	O
the	O
automobiles	O
,	O
as	O
well	O
as	O
the	O
interfaces	O
between	O
the	O
organizations	O
that	O
work	O
in	O
the	O
factories	O
.	O
</s>
<s>
The	O
SysML	B-Language
initiative	O
originated	O
in	O
a	O
January	O
2001	O
decision	O
by	O
the	O
International	O
Council	O
on	O
Systems	O
Engineering	O
(	O
INCOSE	O
)	O
Model	O
Driven	O
Systems	O
Design	O
workgroup	O
to	O
customize	O
the	O
UML	B-Language
for	O
systems	O
engineering	O
applications	O
.	O
</s>
<s>
Following	O
this	O
decision	O
,	O
INCOSE	O
and	O
the	O
Object	B-Architecture
Management	I-Architecture
Group	I-Architecture
(	O
OMG	B-Architecture
)	O
,	O
which	O
maintains	O
the	O
UML	B-Language
specification	O
,	O
jointly	O
chartered	O
the	O
OMG	B-Architecture
Systems	O
Engineering	O
Domain	O
Special	O
Interest	O
Group	O
(	O
SE	O
DSIG	O
)	O
in	O
July	O
2001	O
.	O
</s>
<s>
The	O
SE	O
DSIG	O
,	O
with	O
support	O
from	O
INCOSE	O
and	O
the	O
ISO	O
AP	O
233	O
workgroup	O
,	O
developed	O
the	O
requirements	O
for	O
the	O
modeling	O
language	O
,	O
which	O
were	O
subsequently	O
issued	O
by	O
the	O
OMG	B-Architecture
parting	O
in	O
the	O
UML	B-Language
for	O
Systems	O
Engineering	O
Request	O
for	O
Proposal	O
(	O
UML	B-Language
for	O
SE	O
RFP	O
;	O
OMG	B-Architecture
document	O
ad/03	O
-03-41	O
)	O
in	O
March	O
2003	O
.	O
</s>
<s>
In	O
2003	O
David	O
Oliver	O
and	O
Sanford	O
Friedenthal	O
of	O
INCOSE	O
requested	O
that	O
Cris	O
Kobryn	O
,	O
who	O
successfully	O
led	O
the	O
UML	B-Language
1	O
and	O
UML	B-Language
2	I-Language
language	O
design	O
teams	O
,	O
lead	O
their	O
joint	O
effort	O
to	O
respond	O
to	O
the	O
UML	B-Language
for	O
SE	O
RFP	O
.	O
</s>
<s>
As	O
Chair	O
of	O
the	O
SysML	B-Language
Partners	O
,	O
Kobryn	O
coined	O
the	O
language	O
name	O
"	O
SysML	B-Language
"	O
(	O
short	O
for	O
"	O
Systems	B-Language
Modeling	I-Language
Language	I-Language
"	O
)	O
,	O
designed	O
the	O
original	O
SysML	B-Language
logo	O
,	O
and	O
organized	O
the	O
SysML	B-Language
Language	O
Design	O
team	O
as	O
an	O
open	B-License
source	I-License
specification	O
project	O
.	O
</s>
<s>
Friedenthal	O
served	O
as	O
Deputy	O
Chair	O
,	O
and	O
helped	O
organize	O
the	O
original	O
SysML	B-Language
Partners	O
team	O
.	O
</s>
<s>
In	O
January	O
2005	O
,	O
the	O
SysML	B-Language
Partners	O
published	O
the	O
SysML	B-Language
v0.9	O
draft	O
specification	O
.	O
</s>
<s>
Later	O
,	O
in	O
August	O
2005	O
,	O
Friedenthal	O
and	O
several	O
other	O
original	O
SysML	B-Language
Partners	O
left	O
to	O
establish	O
a	O
competing	O
SysML	B-Language
Submission	O
Team	O
(	O
SST	O
)	O
.	O
</s>
<s>
The	O
SysML	B-Language
Partners	O
released	O
the	O
SysML	B-Language
v1.0	O
Alpha	O
specification	O
in	O
November	O
2005	O
.	O
</s>
<s>
After	O
a	O
series	O
of	O
competing	O
SysML	B-Language
specification	O
proposals	O
,	O
a	O
SysML	B-Language
Merge	O
Team	O
was	O
proposed	O
to	O
the	O
OMG	B-Architecture
in	O
April	O
2006	O
.	O
</s>
<s>
This	O
proposal	O
was	O
voted	O
upon	O
and	O
adopted	O
by	O
the	O
OMG	B-Architecture
in	O
July	O
2006	O
as	O
OMG	B-Language
SysML	I-Language
,	O
to	O
differentiate	O
it	O
from	O
the	O
original	O
open	B-License
source	I-License
specification	O
from	O
which	O
it	O
was	O
derived	O
.	O
</s>
<s>
Because	O
OMG	B-Language
SysML	I-Language
is	O
derived	O
from	O
open	B-License
source	I-License
SysML	B-Language
,	O
it	O
also	O
includes	O
an	O
open	B-License
source	I-License
license	O
for	O
distribution	O
and	O
use	O
.	O
</s>
<s>
The	O
OMG	B-Language
SysML	I-Language
v	O
.	O
1.0	O
specification	O
was	O
issued	O
by	O
the	O
OMG	B-Architecture
as	O
an	O
Available	O
Specification	O
in	O
September	O
2007	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
OMG	B-Language
SysML	I-Language
is	O
v1.6	O
,	O
which	O
was	O
issued	O
by	O
the	O
OMG	B-Architecture
in	O
December	O
2019	O
.	O
</s>
<s>
In	O
addition	O
,	O
SysML	B-Language
was	O
published	O
by	O
the	O
International	O
Organization	O
for	O
Standardization	O
(	O
ISO	O
)	O
in	O
2017	O
as	O
a	O
full	O
International	O
Standard	O
(	O
IS	O
)	O
,	O
ISO/IEC	O
19514:2017	O
(	O
Information	O
technology	O
--	O
Object	B-Architecture
management	I-Architecture
group	I-Architecture
systems	B-Language
modeling	I-Language
language	I-Language
)	O
.	O
</s>
<s>
The	O
OMG	B-Architecture
has	O
been	O
working	O
on	O
the	O
next	O
generation	O
of	O
SysML	B-Language
and	O
issued	O
a	O
Request	O
for	O
Proposals	O
(	O
RFP	O
)	O
for	O
version	O
2	O
on	O
December	O
8	O
,	O
2017	O
,	O
following	O
its	O
open	O
standardization	O
process	O
.	O
</s>
<s>
The	O
resulting	O
specification	O
,	O
which	O
will	O
incorporate	O
language	O
enhancements	O
from	O
experience	O
applying	O
the	O
language	O
,	O
will	O
include	O
a	O
UML	B-Language
profile	I-Language
,	O
a	O
metamodel	O
,	O
and	O
a	O
mapping	O
between	O
the	O
profile	B-Language
and	O
metamodel	O
.	O
</s>
<s>
A	O
second	O
RFP	O
for	O
a	O
SysML	B-Language
v2	O
Application	B-Application
Programming	I-Application
Interface	I-Application
(	O
API	B-Application
)	O
and	O
Services	O
RFP	O
was	O
issued	O
in	O
June	O
2018	O
.	O
</s>
<s>
Its	O
aim	O
is	O
to	O
enhance	O
the	O
interoperability	O
of	O
model-based	B-Language
systems	I-Language
engineering	I-Language
tools	O
.	O
</s>
<s>
SysML	B-Language
includes	O
9	O
types	O
of	O
diagram	O
,	O
some	O
of	O
which	O
are	O
taken	O
from	O
UML	B-Language
.	O
</s>
<s>
There	O
are	O
several	O
modeling	O
tool	O
vendors	O
already	O
offering	O
SysML	B-Language
support	O
,	O
or	O
are	O
in	O
the	O
process	O
of	O
updating	O
their	O
tools	O
to	O
comply	O
with	O
the	O
OMG	B-Language
SysML	I-Language
specification	O
.	O
</s>
<s>
Lists	O
of	O
tool	O
vendors	O
who	O
support	O
,	O
or	O
have	O
announced	O
support	O
of	O
,	O
SysML	B-Language
or	O
OMG	B-Language
SysML	I-Language
can	O
be	O
found	O
on	O
the	O
SysML	B-Language
Forum	O
or	O
SysML	B-Language
websites	O
,	O
respectively	O
.	O
</s>
<s>
As	O
an	O
OMG	B-Architecture
UML	B-Language
2.0	I-Language
profile	B-Language
,	O
SysML	B-Language
models	O
are	O
designed	O
to	O
be	O
exchanged	O
using	O
the	O
XML	B-Language
Metadata	I-Language
Interchange	I-Language
(	O
XMI	O
)	O
standard	O
.	O
</s>
