<s>
In	O
the	O
Unified	B-Language
Modeling	I-Language
Language	I-Language
1.x	O
,	O
powertype	B-Language
is	O
a	O
keyword	O
for	O
a	O
specific	O
UML	B-Language
stereotype	B-Language
,	O
and	O
applies	O
to	O
a	O
class	O
or	O
dependency	B-Application
.	O
</s>
<s>
Powertype	B-Language
shows	O
a	O
classifier	B-Language
whose	O
instances	O
(	O
objects	O
)	O
are	O
children	O
of	O
the	O
given	O
parent	O
.	O
</s>
<s>
In	O
UML	O
2.x	O
,	O
a	O
powertype	B-Language
is	O
a	O
metaclass	B-Language
whose	O
instances	O
are	O
subclasses	O
of	O
a	O
given	O
class	O
.	O
</s>
<s>
The	O
stereotype	B-Language
has	O
been	O
removed	O
and	O
the	O
powertype	B-Language
is	O
now	O
indicated	O
by	O
typing	O
the	O
generalization	O
set	O
.	O
</s>
<s>
In	O
the	O
UML	B-Language
Superstructure	O
2.4.1	O
Specification	O
Document	O
the	O
following	O
definition	O
is	O
given	O
:	O
</s>
