<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
the	O
semantic	B-Application
desktop	I-Application
is	O
a	O
collective	O
term	O
for	O
ideas	O
related	O
to	O
changing	O
a	O
computer	O
's	O
user	B-Application
interface	I-Application
and	O
data	O
handling	O
capabilities	O
so	O
that	O
data	O
are	O
more	O
easily	O
shared	O
between	O
different	O
applications	O
or	O
tasks	O
and	O
so	O
that	O
data	O
that	O
once	O
could	O
not	O
be	O
automatically	O
processed	O
by	O
a	O
computer	O
could	O
be	O
.	O
</s>
<s>
The	O
vision	O
of	O
the	O
semantic	B-Application
desktop	I-Application
can	O
be	O
considered	O
as	O
a	O
response	O
to	O
the	O
perceived	O
problems	O
of	O
existing	O
user	B-Application
interfaces	I-Application
.	O
</s>
<s>
For	O
example	O
,	O
suppose	O
one	O
downloads	O
a	O
document	O
by	O
a	O
particular	O
author	O
on	O
a	O
particular	O
subject	O
-	O
though	O
the	O
document	O
will	O
likely	O
clearly	O
indicate	O
its	O
subject	O
,	O
author	O
,	O
source	O
and	O
possibly	O
copyright	O
information	O
there	O
may	O
be	O
no	O
easy	O
way	O
for	O
the	O
computer	O
to	O
obtain	O
this	O
information	O
and	O
process	O
it	O
across	O
applications	O
like	O
file	O
managers	O
,	O
desktop	B-Application
search	I-Application
engines	I-Application
,	O
and	O
other	O
services	O
.	O
</s>
<s>
Neither	O
has	O
anything	O
to	O
do	O
with	O
tasks	O
,	O
notes	O
or	O
planned	O
activities	O
that	O
may	O
be	O
stored	O
in	O
a	O
calendar	B-Application
program	I-Application
.	O
</s>
<s>
Related	O
to	O
this	O
,	O
a	O
user	O
will	O
often	O
access	O
a	O
lot	O
of	O
data	O
from	O
the	O
Internet	O
which	O
are	O
segregated	O
from	O
the	O
data	O
stored	O
locally	O
on	O
the	O
computer	O
and	O
accessed	O
through	O
a	O
browser	B-Application
or	O
other	O
program	O
.	O
</s>
<s>
As	O
well	O
as	O
accessing	O
data	O
,	O
a	O
user	O
has	O
to	O
share	O
data	O
,	O
often	O
through	O
e-mail	O
or	O
separate	O
file	B-Protocol
transfer	I-Protocol
programs	O
.	O
</s>
<s>
The	O
semantic	B-Application
desktop	I-Application
is	O
an	O
attempt	O
to	O
solve	O
some	O
or	O
all	O
of	O
these	O
problem	O
by	O
extending	O
the	O
operating	O
system	O
's	O
capabilities	O
to	O
handle	O
all	O
data	O
using	O
Semantic	O
Web	O
technologies	O
.	O
</s>
<s>
Based	O
on	O
this	O
data	O
integration	O
,	O
improved	O
user	B-Application
interfaces	I-Application
(	O
or	O
plugins	O
to	O
existing	O
applications	O
)	O
can	O
give	O
the	O
user	O
an	O
integrated	O
view	O
on	O
stored	O
knowledge	O
.	O
</s>
<s>
Some	O
operating	O
systems	O
such	O
as	O
BeOS	B-Application
have	O
database	O
filesystems	O
which	O
store	O
metadata	O
about	O
a	O
document	O
natively	O
in	O
the	O
filesystem	O
,	O
which	O
is	O
a	O
move	O
towards	O
a	O
more	O
semantic	B-Application
desktop	I-Application
.	O
</s>
<s>
A	O
definition	O
of	O
Semantic	B-Application
Desktop	I-Application
was	O
given	O
(	O
Sauermann	O
et	O
al	O
.	O
</s>
<s>
A	O
Semantic	B-Application
Desktop	I-Application
is	O
a	O
device	O
in	O
which	O
an	O
individual	O
stores	O
all	O
her	O
digital	O
information	O
like	O
documents	O
,	O
multimedia	O
and	O
messages	O
.	O
</s>
<s>
all	O
data	O
is	O
accessible	O
and	O
queryable	O
as	O
Resource	O
Description	O
Framework	B-Architecture
(	O
RDF	O
)	O
graph	O
.	O
</s>
<s>
There	O
are	O
various	O
interpretations	O
of	O
the	O
semantic	B-Application
desktop	I-Application
.	O
</s>
<s>
At	O
its	O
most	O
limited	O
state	O
it	O
might	O
be	O
interpreted	O
as	O
adding	O
mechanisms	O
for	O
relating	O
machine	B-General_Concept
readable	I-General_Concept
metadata	O
to	O
files	O
.	O
</s>
<s>
In	O
a	O
more	O
extreme	O
way	O
it	O
could	O
be	O
viewed	O
as	O
a	O
complete	O
replacement	O
to	O
existing	O
user	B-Application
interfaces	I-Application
,	O
which	O
unifies	O
all	O
forms	O
of	O
data	O
and	O
provides	O
a	O
consistent	O
single	O
interface	O
.	O
</s>
<s>
To	O
foster	O
interoperability	O
between	O
different	O
implementations	O
and	O
publish	O
standards	O
,	O
the	O
community	O
around	O
the	O
Nepomuk	B-Language
project	O
founded	O
the	O
OSCA	O
Foundation	O
(	O
OSCAF	O
)	O
in	O
2008	O
.	O
</s>
<s>
Since	O
June	O
2009	O
,	O
the	O
developers	O
from	O
the	O
Nepomuk-KDE	B-Language
communities	O
and	O
Xesam	O
collaborate	O
with	O
OSCAF	O
to	O
help	O
standardizing	O
the	O
data	O
formats	O
for	O
KDE	B-Application
,	O
GNOME	B-Application
and	O
freedesktop.org	B-Application
.	O
</s>
<s>
The	O
Nepomuk/OSCAF	O
standards	O
are	O
taken	O
up	O
by	O
these	O
projects	O
and	O
Nokia	O
's	O
Maemo	B-Operating_System
Platform	I-Operating_System
.	O
</s>
<s>
The	O
Semantic	O
Web	O
is	O
mainly	O
concerned	O
with	O
making	O
machine	B-General_Concept
readable	I-General_Concept
metadata	O
to	O
enable	O
computers	O
to	O
process	O
shared	O
information	O
,	O
and	O
the	O
creation	O
of	O
formats	O
and	O
standards	O
related	O
to	O
this	O
.	O
</s>
<s>
In	O
practice	O
most	O
projects	O
related	O
to	O
the	O
semantic	B-Application
desktop	I-Application
make	O
use	O
of	O
Semantic	O
Web	O
protocols	O
for	O
storing	O
their	O
data	O
.	O
</s>
