<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
the	O
terms	O
TBox	B-General_Concept
and	O
ABox	B-General_Concept
are	O
used	O
to	O
describe	O
two	O
different	O
types	O
of	O
statements	O
in	O
knowledge	O
bases	O
.	O
</s>
<s>
TBox	B-General_Concept
statements	O
are	O
the	O
"	O
terminology	O
component	O
"	O
,	O
and	O
describe	O
a	O
domain	O
of	O
interest	O
by	O
defining	O
classes	O
and	O
properties	O
as	O
a	O
domain	O
vocabulary	O
.	O
</s>
<s>
ABox	B-General_Concept
statements	O
are	O
the	O
"	O
assertion	O
component	O
"	O
—	O
facts	O
associated	O
with	O
the	O
TBox	B-General_Concept
's	O
conceptual	O
model	O
or	O
ontologies	O
.	O
</s>
<s>
Together	O
ABox	B-General_Concept
and	O
TBox	B-General_Concept
statements	O
make	O
up	O
a	O
knowledge	O
base	O
or	O
a	O
knowledge	B-Application
graph	I-Application
.	O
</s>
<s>
ABox	B-General_Concept
statements	O
must	O
be	O
TBox-compliant	O
:	O
they	O
are	O
assertions	O
that	O
use	O
the	O
vocabulary	O
defined	O
by	O
the	O
TBox	B-General_Concept
.	O
</s>
<s>
TBox	B-General_Concept
statements	O
are	O
sometimes	O
associated	O
with	O
object-oriented	O
classes	O
and	O
ABox	B-General_Concept
statements	O
associated	O
with	O
instances	O
of	O
those	O
classes	O
.	O
</s>
<s>
ABox	B-General_Concept
statements	O
typically	O
deal	O
with	O
concrete	O
entities	O
.	O
</s>
<s>
TBox	B-General_Concept
statements	O
typically	O
(	O
or	O
definitions	O
of	O
domain	O
categories	O
and	O
implied	O
relations	O
)	O
such	O
as	O
:	O
</s>
<s>
TBox	B-General_Concept
statements	O
tend	O
to	O
be	O
more	O
permanent	O
within	O
a	O
knowledge	O
base	O
and	O
are	O
used	O
and	O
stored	O
as	O
a	O
schema	O
or	O
a	O
data	O
model	O
.	O
</s>
<s>
In	O
contrast	O
,	O
ABox	B-General_Concept
statements	O
are	O
much	O
more	O
dynamic	O
in	O
nature	O
and	O
tend	O
to	O
be	O
stored	O
as	O
instance	O
data	O
within	O
transactional	O
systems	O
within	O
databases	O
.	O
</s>
<s>
With	O
the	O
newer	O
,	O
NoSQL	B-General_Concept
databases	O
and	O
especially	O
with	O
RDF	O
databases	O
(	O
see	O
Triplestore	O
)	O
the	O
storage	O
distinction	O
may	O
no	O
longer	O
apply	O
.	O
</s>
