<s>
Search-based	B-Application
applications	I-Application
are	O
software	B-Application
applications	I-Application
in	O
which	O
a	O
search	B-Application
engine	I-Application
platform	I-Application
is	O
used	O
as	O
the	O
core	O
infrastructure	O
for	O
information	O
access	O
and	O
reporting	O
.	O
</s>
<s>
Search-based	B-Application
applications	I-Application
use	O
semantic	O
technologies	O
to	O
aggregate	O
,	O
normalize	O
and	O
classify	O
unstructured	B-Application
,	O
semi-structured	B-Application
and/or	O
structured	B-Application
content	I-Application
across	O
multiple	O
repositories	O
,	O
and	O
employ	O
natural	B-Language
language	I-Language
technologies	I-Language
for	O
accessing	O
the	O
aggregated	O
information	O
.	O
</s>
<s>
Search-based	B-Application
applications	I-Application
are	O
fully	O
packaged	O
applications	O
that	O
:	O
</s>
<s>
Search-based	B-Application
applications	I-Application
are	O
used	O
for	O
a	O
variety	O
of	O
purposes	O
,	O
including	O
:	O
</s>
<s>
Web	O
Applications	O
:	O
Typically	O
,	O
business	O
to	O
business	O
,	O
business	O
to	O
consumer	O
,	O
and	O
consumer	O
to	O
business	O
applications	O
that	O
mash-up	B-Application
data	O
and	O
functionality	O
from	O
diverse	O
sources	O
(	O
databases	O
,	O
Web	O
content	O
,	O
user-generated	O
content	O
,	O
mapping	O
data	O
and	O
functions	O
,	O
etc	O
.	O
)	O
</s>
<s>
The	O
use	O
of	O
a	O
search	O
platform	O
as	O
the	O
core	O
infrastructure	O
for	O
software	B-Application
applications	I-Application
has	O
been	O
enabled	O
largely	O
by	O
two	O
search	B-Application
engine	I-Application
features	O
:	O
1	O
)	O
Scalability	O
2	O
)	O
Ad	O
hoc	O
access	O
to	O
multiple	O
heterogeneous	O
sources	O
from	O
a	O
single	O
point	O
of	O
access	O
.	O
</s>
<s>
Search-based	B-Application
applications	I-Application
have	O
proven	O
popular	O
and	O
effective	O
because	O
they	O
provide	O
a	O
dynamic	O
,	O
scalable	O
access	O
infrastructure	O
that	O
can	O
be	O
integrated	O
with	O
other	O
features	O
that	O
information	O
workers	O
need	O
:	O
task-specific	O
,	O
and	O
easy	O
to	O
use	O
work	O
environments	O
that	O
integrate	O
features	O
that	O
are	O
usually	O
designed	O
to	O
be	O
used	O
as	O
separate	O
applications	O
,	O
collaborative	O
features	O
,	O
domain	O
knowledge	O
,	O
and	O
security	O
.	O
</s>
<s>
Search	B-Application
engines	I-Application
are	O
not	O
a	O
replacement	O
for	O
database	O
systems	O
;	O
they	O
are	O
a	O
complement	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
mathematical	O
and	O
statistical	O
processors	O
integrated	O
to	O
date	O
into	O
search	B-Application
engines	I-Application
remain	O
relatively	O
simple	O
.	O
</s>
