<s>
Generic	B-Application
data	I-Application
models	I-Application
are	O
generalizations	O
of	O
conventional	O
data	B-Application
models	I-Application
.	O
</s>
<s>
The	O
definition	O
of	O
generic	B-Application
data	I-Application
model	I-Application
is	O
similar	O
to	O
the	O
definition	O
of	O
a	O
natural	O
language	O
.	O
</s>
<s>
For	O
example	O
,	O
a	O
generic	B-Application
data	I-Application
model	I-Application
may	O
define	O
relation	O
types	O
such	O
as	O
a	O
'	O
classification	O
relation	O
 '	O
,	O
being	O
a	O
binary	O
relation	O
between	O
an	O
individual	O
thing	O
and	O
a	O
kind	O
of	O
thing	O
(	O
a	O
class	O
)	O
and	O
a	O
'	O
part-whole	O
relation	O
 '	O
,	O
being	O
a	O
binary	O
relation	O
between	O
two	O
things	O
,	O
one	O
with	O
the	O
role	O
of	O
part	O
,	O
the	O
other	O
with	O
the	O
role	O
of	O
whole	O
,	O
regardless	O
the	O
kind	O
of	O
things	O
that	O
are	O
related	O
.	O
</s>
<s>
By	O
standardisation	O
of	O
an	O
extensible	O
list	O
of	O
relation	O
types	O
,	O
a	O
generic	B-Application
data	I-Application
model	I-Application
enables	O
the	O
expression	O
of	O
an	O
unlimited	O
number	O
of	O
kinds	O
of	O
facts	O
and	O
will	O
approach	O
the	O
capabilities	O
of	O
natural	O
languages	O
.	O
</s>
<s>
Conventional	O
data	B-Application
models	I-Application
,	O
on	O
the	O
other	O
hand	O
,	O
have	O
a	O
fixed	O
and	O
limited	O
domain	O
scope	O
,	O
because	O
the	O
instantiation	O
(	O
usage	O
)	O
of	O
such	O
a	O
model	O
only	O
allows	O
expressions	O
of	O
kinds	O
of	O
facts	O
that	O
are	O
predefined	O
in	O
the	O
model	O
.	O
</s>
<s>
Generic	B-Application
data	I-Application
models	I-Application
are	O
developed	O
as	O
an	O
approach	O
to	O
solve	O
some	O
shortcomings	O
of	O
conventional	O
data	B-Application
models	I-Application
.	O
</s>
<s>
For	O
example	O
,	O
different	O
modelers	O
usually	O
produce	O
different	O
conventional	O
data	B-Application
models	I-Application
of	O
the	O
same	O
domain	O
.	O
</s>
<s>
More	O
concrete	O
and	O
specific	O
data	B-Application
models	I-Application
will	O
risk	O
having	O
to	O
change	O
as	O
the	O
scope	O
or	O
environment	O
changes	O
.	O
</s>
<s>
A	O
generic	B-Application
data	I-Application
model	I-Application
shall	O
consist	O
of	O
generic	O
entity	O
types	O
,	O
such	O
as	O
'	O
individual	O
thing	O
 '	O
,	O
'	O
class	O
 '	O
,	O
'	O
relationship	O
 '	O
,	O
and	O
possibly	O
a	O
number	O
of	O
their	O
subtypes	O
.	O
</s>
<s>
This	O
way	O
of	O
modeling	O
allows	O
the	O
addition	O
of	O
standard	O
classes	O
and	O
standard	O
relation	O
types	O
as	O
data	O
(	O
instances	O
)	O
,	O
which	O
makes	O
the	O
data	B-Application
model	I-Application
flexible	O
and	O
prevents	O
data	B-Application
model	I-Application
changes	O
when	O
the	O
scope	O
of	O
the	O
application	O
changes	O
.	O
</s>
<s>
A	O
generic	B-Application
data	I-Application
model	I-Application
obeys	O
the	O
following	O
rules ]	O
:	O
</s>
<s>
Found	O
in	O
Data	B-Application
Model	I-Application
Patterns	O
:	O
Conventions	O
of	O
Thought	O
by	O
David	O
C	O
.	O
Hay	O
.	O
</s>
