<s>
CLIPS	B-Application
is	O
a	O
public	B-Application
domain	I-Application
software	I-Application
tool	O
for	O
building	O
expert	B-Application
systems	I-Application
.	O
</s>
<s>
The	O
name	O
is	O
an	O
acronym	O
for	O
"	O
C	B-Language
Language	I-Language
Integrated	O
Production	O
System.	O
"	O
</s>
<s>
The	O
syntax	O
and	O
name	O
were	O
inspired	O
by	O
Charles	O
Forgy	O
's	O
OPS5	B-Language
.	O
</s>
<s>
The	O
first	O
versions	O
of	O
CLIPS	B-Application
were	O
developed	O
starting	O
in	O
1985	O
at	O
NASA-Johnson	O
Space	O
Center	O
(	O
as	O
an	O
alternative	O
for	O
existing	O
system	O
ART*Inference	O
)	O
until	O
the	O
mid-1990s	O
when	O
the	O
development	O
group	O
's	O
responsibilities	O
ceased	O
to	O
focus	O
on	O
expert	B-Application
system	I-Application
technology	O
.	O
</s>
<s>
CLIPS	B-Application
was	O
probably	O
the	O
most	O
widely	O
used	O
expert	B-Application
system	I-Application
tool	O
as	O
of	O
2005	O
.	O
</s>
<s>
CLIPS	B-Application
itself	O
is	O
written	O
in	O
C	B-Language
,	O
extensions	O
can	O
be	O
written	O
in	O
C	B-Language
,	O
and	O
CLIPS	B-Application
can	O
be	O
called	O
from	O
C	B-Language
.	O
Its	O
syntax	O
resembles	O
that	O
of	O
the	O
programming	O
language	O
Lisp	B-Language
.	O
</s>
<s>
CLIPS	B-Application
incorporates	O
a	O
complete	O
object-oriented	B-Language
language	I-Language
for	O
writing	O
expert	B-Application
systems	I-Application
.	O
</s>
<s>
COOL	O
combines	O
the	O
programming	O
paradigms	O
of	O
procedural	O
,	O
object	B-Language
oriented	I-Language
and	O
logical	O
(	O
theorem	O
proving	O
)	O
languages	O
.	O
</s>
<s>
CLIPS	B-Application
uses	O
forward	O
chaining	O
.	O
</s>
<s>
Like	O
other	O
expert	B-Application
system	I-Application
languages	O
,	O
CLIPS	B-Application
deals	O
with	O
rules	O
and	O
facts	O
.	O
</s>
<s>
Having	O
set	O
this	O
up	O
,	O
the	O
(	O
reset	O
)	O
command	O
causes	O
CLIPS	B-Application
to	O
read	O
the	O
facts	O
and	O
rules	O
.	O
</s>
<s>
In	O
CLIPS	B-Application
,	O
salience	O
allows	O
a	O
user	O
to	O
assign	O
priority	O
(	O
or	O
weight	O
)	O
to	O
a	O
rule	O
.	O
</s>
<s>
Descendants	O
of	O
the	O
CLIPS	B-Application
language	O
include	O
Jess	B-Language
(	O
rule-based	O
portion	O
of	O
CLIPS	B-Application
rewritten	O
in	O
Java	B-Language
,	O
it	O
later	O
grew	O
up	O
in	O
different	O
direction	O
)	O
,	O
and	O
FuzzyCLIPS	B-Language
(	O
which	O
adds	O
concept	O
of	O
relevancy	O
into	O
the	O
language	O
)	O
.	O
</s>
