<s>
Common	B-Language
Logic	I-Language
(	O
CL	O
)	O
is	O
a	O
framework	O
for	O
a	O
family	O
of	O
logic	B-Language
languages	I-Language
,	O
based	O
on	O
first-order	O
logic	O
,	O
intended	O
to	O
facilitate	O
the	O
exchange	O
and	O
transmission	O
of	O
knowledge	O
in	O
computer-based	O
systems	O
.	O
</s>
<s>
Common	B-Language
Logic	I-Language
is	O
published	O
by	O
ISO	O
as	O
"	O
ISO/IEC	O
24707:2007	O
-	O
Information	O
technology	O
—	O
Common	B-Language
Logic	I-Language
(	O
CL	O
)	O
:	O
a	O
framework	O
for	O
a	O
family	O
of	O
logic-based	O
languages	O
"	O
.	O
</s>
<s>
The	O
CL	O
Standard	O
includes	O
specifications	O
for	O
three	O
dialects	O
,	O
the	O
Common	B-Language
Logic	I-Language
Interchange	I-Language
Format	I-Language
(	O
CLIF	O
)	O
(	O
Annex	O
A	O
)	O
,	O
the	O
Conceptual	B-Language
Graph	I-Language
Interchange	I-Language
Format	I-Language
(	O
CGIF	B-Language
)	O
(	O
Annex	O
B	O
)	O
,	O
and	O
an	O
XML-based	O
notation	O
for	O
Common	B-Language
Logic	I-Language
(	O
XCL	O
)	O
(	O
Annex	O
C	O
)	O
.	O
</s>
<s>
The	O
semantics	O
of	O
these	O
dialects	O
are	O
defined	O
in	O
the	O
Standard	O
by	O
their	O
translation	O
to	O
the	O
abstract	O
syntax	O
and	O
semantics	O
of	O
Common	B-Language
Logic	I-Language
.	O
</s>
<s>
Many	O
other	O
logic-based	O
languages	O
could	O
also	O
be	O
defined	O
as	O
subsets	O
of	O
CL	O
by	O
means	O
of	O
similar	O
translations	O
;	O
among	O
them	O
are	O
the	O
RDF	O
and	O
OWL	B-Language
languages	O
,	O
which	O
have	O
been	O
defined	O
by	O
the	O
W3C	O
.	O
</s>
