<s>
Swift	B-Language
is	O
an	O
implicitly	B-Operating_System
parallel	I-Operating_System
programming	O
language	O
that	O
allows	O
writing	O
scripts	O
that	O
distribute	O
program	O
execution	O
across	O
distributed	B-Architecture
computing	I-Architecture
resources	O
,	O
including	O
clusters	B-Architecture
,	O
clouds	B-Architecture
,	O
grids	B-Architecture
,	O
and	O
supercomputers	B-Architecture
.	O
</s>
<s>
Swift	B-Language
implementations	O
are	O
open-source	B-Application
software	I-Application
under	O
the	O
Apache	B-Application
License	I-Application
,	I-Application
version	I-Application
2.0	I-Application
.	O
</s>
<s>
A	O
Swift	B-Language
script	O
describes	O
strongly	O
typed	O
data	O
,	O
application	O
components	O
,	O
invocations	O
of	O
applications	O
components	O
,	O
and	O
the	O
inter-relations	O
in	O
the	O
dataflow	B-Application
between	O
those	O
invocations	O
.	O
</s>
<s>
A	O
special	O
file	O
data	O
type	O
is	O
built	O
into	O
Swift	B-Language
.	O
</s>
<s>
A	O
concept	O
of	O
mapping	B-General_Concept
is	O
used	O
to	O
store	O
and	O
exchange	O
complex	O
data	O
structures	O
using	O
a	O
file	O
system	O
structure	O
with	O
files	O
and	O
directories	O
.	O
</s>
<s>
A	O
Message	B-Application
Passing	I-Application
Interface	I-Application
based	O
implementation	O
of	O
the	O
language	O
supports	O
very	O
high	O
task	O
execution	O
rates	O
(	O
e.g.	O
,	O
3000	O
tasks	O
per	O
second	O
)	O
on	O
large	O
clusters	B-Architecture
and	O
supercomputers	B-Architecture
.	O
</s>
