<s>
ROOP	B-Language
is	O
a	O
multiparadigm	O
programming	O
language	O
targeted	O
at	O
AI	B-Application
applications	O
created	O
at	O
the	O
Chengdu	O
University	O
of	O
China	O
.	O
</s>
<s>
It	O
combines	O
rule-based	B-Language
,	O
procedural	B-Application
,	O
logical	B-Language
and	O
object-oriented	B-Language
programming	I-Language
techniques	O
.	O
</s>
<s>
ROOP	B-Language
is	O
directly	O
built	O
upon	O
C++	B-Language
,	O
providing	O
full	O
unrestricted	O
access	O
to	O
all	O
its	O
features	O
.	O
</s>
<s>
ROOP	B-Language
,	O
like	O
OPS-83	O
and	O
ORBS	O
,	O
is	O
data-driven	O
but	O
,	O
unlike	O
those	O
languages	O
,	O
rules	O
in	O
ROOP	B-Language
may	O
enter	O
into	O
local	O
communication	O
and	O
this	O
can	O
be	O
used	O
to	O
dynamically	O
divide	O
them	O
into	O
groups	O
,	O
including	O
the	O
problem	O
status	O
space	O
tree	O
.	O
</s>
<s>
Rules	O
and	O
facts	O
in	O
ROOP	B-Language
are	O
objects	O
,	O
and	O
they	O
send	O
and	O
respond	O
to	O
messages	O
just	O
like	O
any	O
other	O
object	O
in	O
the	O
language	O
.	O
</s>
<s>
This	O
capability	O
is	O
not	O
typically	O
available	O
in	O
other	O
logical	B-Language
programming	I-Language
languages	O
such	O
as	O
Prolog	B-Language
.	O
</s>
<s>
ROOP	B-Language
's	O
inference	O
engine	O
can	O
be	O
redefined	O
by	O
the	O
programmer	O
,	O
something	O
which	O
is	O
usually	O
not	O
feasible	O
in	O
other	O
logical	B-Language
languages	O
.	O
</s>
