<s>
DeepPeep	B-Application
was	O
a	O
search	B-Application
engine	I-Application
that	O
aimed	O
to	O
crawl	B-Application
and	O
index	O
every	O
database	O
on	O
the	O
public	O
Web	O
.	O
</s>
<s>
Unlike	O
traditional	O
search	B-Application
engines	I-Application
,	O
which	O
crawl	B-Application
existing	O
webpages	O
and	O
their	O
hyperlinks	O
,	O
DeepPeep	B-Application
aimed	O
to	O
allow	O
access	O
to	O
the	O
so-called	O
Deep	O
web	O
,	O
World	O
Wide	O
Web	O
content	O
only	O
available	O
via	O
for	O
instance	O
typed	O
queries	O
into	O
databases	O
.	O
</s>
<s>
The	O
project	O
ran	O
a	O
beta	O
search	B-Application
engine	I-Application
and	O
was	O
sponsored	O
by	O
the	O
University	O
of	O
Utah	O
and	O
a	O
$	O
243,000	O
grant	O
from	O
the	O
National	O
Science	O
Foundation	O
.	O
</s>
<s>
Similar	O
to	O
Google	B-Application
,	O
Yahoo	B-Application
,	O
and	O
other	O
search	B-Application
engines	I-Application
,	O
DeepPeep	B-Application
allows	O
the	O
users	O
to	O
type	O
in	O
a	O
keyword	O
and	O
returns	O
a	O
list	O
of	O
links	O
and	O
databases	O
with	O
information	O
regarding	O
the	B-Application
keyword	I-Application
.	O
</s>
<s>
However	O
,	O
what	O
separated	O
DeepPeep	B-Application
and	O
other	O
search	B-Application
engines	I-Application
is	O
that	O
DeepPeep	B-Application
uses	O
the	O
ACHE	O
crawler	O
,	O
'	O
Hierarchical	O
Form	O
Identification	O
 '	O
,	O
'	O
Context-Aware	O
Form	O
Clustering	O
 '	O
and	O
'	O
LabelEx	O
 '	O
to	O
locate	O
,	O
analyze	O
,	O
and	O
organize	O
web	O
forms	O
to	O
allow	O
easy	O
access	O
to	O
users	O
.	O
</s>
<s>
In	O
order	O
to	O
further	O
eliminate	O
irrelevant	O
links	O
and	O
search	B-Application
results	I-Application
,	O
DeepPeep	B-Application
uses	O
the	O
HIerarchical	O
Form	O
Identification	O
(	O
HIFI	O
)	O
framework	O
that	O
classifies	O
links	O
and	O
search	B-Application
results	I-Application
based	O
on	O
the	O
website	O
's	O
structure	O
and	O
content	O
.	O
</s>
<s>
When	O
there	O
is	O
no	O
domain	O
of	O
interest	O
or	O
the	O
domain	O
specified	O
has	O
multiple	O
types	O
of	O
definition	O
,	O
DeepPeep	B-Application
must	O
separate	O
the	O
web	O
form	O
and	O
cluster	O
them	O
into	O
similar	O
domains	O
.	O
</s>
<s>
The	O
search	B-Application
engine	I-Application
uses	O
context-aware	O
clustering	O
to	O
group	O
similar	O
links	O
in	O
the	O
same	O
domain	O
by	O
modeling	O
the	O
web	O
form	O
into	O
sets	O
of	O
hyperlinks	O
and	O
using	O
its	O
context	O
for	O
comparison	O
.	O
</s>
<s>
DeepPeep	B-Application
further	O
extracts	O
information	O
called	O
Meta-Data	O
from	O
these	O
pages	O
which	O
allows	O
for	O
better	O
ranking	O
of	O
links	O
and	O
databases	O
with	O
the	O
use	O
of	O
LabelEx	O
,	O
an	O
approach	O
for	O
automatic	O
decomposition	O
and	O
extraction	O
of	O
meta-data	O
.	O
</s>
<s>
When	O
the	O
search	B-Application
results	I-Application
pop	O
up	O
after	O
the	O
user	O
has	O
input	O
their	O
keyword	O
,	O
DeepPeep	B-Application
ranks	O
the	O
links	O
based	O
on	O
3	O
features	O
:	O
term	O
content	O
,	O
number	O
of	O
backlinks	O
.	O
</s>
<s>
and	O
pagerank	B-Algorithm
.	O
</s>
<s>
Pageranks	B-Algorithm
is	O
the	O
ranking	O
of	O
websites	O
in	O
search	B-Application
engine	I-Application
results	O
and	O
works	O
by	O
counting	O
the	O
amount	O
and	O
quality	O
of	O
links	O
to	O
website	O
to	O
determine	O
its	O
importance	O
.	O
</s>
<s>
Pagerank	B-Algorithm
and	O
back	O
link	O
information	O
are	O
obtained	O
from	O
outside	O
sources	O
such	O
as	O
Google	B-Application
,	O
Yahoo	B-Application
,	O
and	O
Bing	B-Application
.	O
</s>
<s>
DeepPeep	B-Application
Beta	O
was	O
launched	O
and	O
only	O
covered	O
seven	O
domains	O
:	O
auto	O
,	O
airfare	O
,	O
biology	O
,	O
book	O
,	O
hotel	O
,	O
job	O
,	O
and	O
rental	O
.	O
</s>
<s>
Under	O
these	O
seven	O
domains	O
,	O
DeepPeep	B-Application
offered	O
access	O
to	O
13,000	O
Web	O
forms	O
.	O
</s>
<s>
One	O
could	O
access	O
the	O
website	O
at	O
deeppeep.org,	O
but	O
the	O
website	O
has	O
been	O
inactive	O
after	O
the	O
beta	O
version	O
was	O
taken	O
down	O
.	O
</s>
