<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
a	O
weak	B-General_Concept
ontology	I-General_Concept
is	O
an	O
ontology	O
that	O
is	O
not	O
sufficiently	O
rigorous	O
to	O
allow	O
software	O
to	O
infer	O
new	O
facts	O
without	O
intervention	O
by	O
humans	O
(	O
the	O
end	O
users	O
of	O
the	O
software	O
system	O
)	O
.	O
</s>
<s>
By	O
this	O
standard	O
–	O
which	O
evolved	O
as	O
artificial	B-Application
intelligence	I-Application
methods	O
became	O
more	O
sophisticated	O
,	O
and	O
computers	O
were	O
used	O
to	O
model	O
high	O
human	O
impact	O
decisions	O
–	O
most	O
databases	O
use	O
weak	B-General_Concept
ontologies	I-General_Concept
.	O
</s>
<s>
A	O
weak	B-General_Concept
ontology	I-General_Concept
is	O
adequate	O
for	O
many	O
purposes	O
,	O
including	O
education	O
,	O
where	O
one	O
teaches	O
a	O
set	O
of	O
distinctions	O
and	O
tries	O
to	O
induce	O
the	O
power	O
to	O
make	O
those	O
distinctions	O
in	O
the	O
student	O
.	O
</s>
<s>
On	O
the	O
World	O
Wide	O
Web	O
,	O
folksonomy	B-General_Concept
in	O
the	O
form	O
of	O
tag	O
schemas	O
and	O
typed	B-General_Concept
links	I-General_Concept
has	O
tended	O
to	O
evolve	O
slowly	O
in	O
a	O
variety	O
of	O
forums	O
,	O
and	O
then	O
be	O
standardized	O
in	O
such	O
schemes	O
as	O
microformats	B-General_Concept
as	O
more	O
and	O
more	O
forums	O
agree	O
.	O
</s>
<s>
These	O
weak	B-General_Concept
ontology	I-General_Concept
constructs	O
only	O
become	O
strong	O
in	O
response	O
to	O
growing	O
demands	O
for	O
a	O
more	O
powerful	O
form	O
of	O
search	B-Application
engine	I-Application
than	O
is	O
possible	O
with	O
keywording	O
.	O
</s>
