<s>
Sherlock	B-Operating_System
,	O
named	O
after	O
fictional	O
detective	O
Sherlock	B-Application
Holmes	I-Application
,	O
was	O
a	O
file	O
and	O
web	B-Application
search	I-Application
tool	O
created	O
by	O
Apple	O
Inc	O
.	O
for	O
the	O
PowerPC-based	O
"	B-Application
classic	I-Application
"	I-Application
Mac	I-Application
OS	I-Application
,	O
introduced	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
8	I-Operating_System
as	O
an	O
extension	O
of	O
the	O
Mac	B-Application
OS	I-Application
Finder	I-Application
's	O
file	O
searching	O
capabilities	O
.	O
</s>
<s>
Like	O
its	O
predecessor	O
(	O
System	O
7.5	O
’	O
s	O
totally	O
revamped	O
'	O
Find	O
File	O
 '	O
app	O
,	O
adapted	O
by	O
Bill	O
Monk	O
from	O
his	O
'	O
Find	O
Pro	O
 '	O
shareware	O
find	O
program	O
)	O
,	O
Sherlock	B-Operating_System
searched	O
for	O
local	O
files	O
and	O
file	O
contents	O
,	O
using	O
the	O
same	O
basic	O
indexing	O
code	O
and	O
search	O
logic	O
found	O
in	O
AppleSearch	B-Operating_System
.	O
</s>
<s>
Sherlock	B-Operating_System
extended	O
the	O
system	O
by	O
enabling	O
the	O
user	O
to	O
search	O
for	O
items	O
through	O
the	O
World	O
Wide	O
Web	O
through	O
a	O
set	O
of	O
plugins	O
which	O
employed	O
existing	O
web	B-Application
search	I-Application
engines	I-Application
.	O
</s>
<s>
These	O
plugins	O
were	O
written	O
as	O
plain	O
text	O
files	O
,	O
so	O
that	O
it	O
was	O
a	O
simple	O
task	O
for	O
a	O
user	O
to	O
write	O
a	O
Sherlock	B-Operating_System
plugin	O
.	O
</s>
<s>
Sherlock	B-Operating_System
was	O
replaced	O
by	O
Spotlight	B-Application
and	O
Dashboard	B-Application
in	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
Tiger	I-Application
,	O
although	O
Apple	O
continued	O
to	O
include	O
it	O
with	O
the	O
default	O
installation	O
.	O
</s>
<s>
Since	O
most	O
of	O
the	O
standard	O
plug-ins	O
for	O
Sherlock	B-Operating_System
provided	O
by	O
Apple	O
itself	O
no	O
longer	O
function	O
,	O
it	O
was	O
officially	O
retired	O
and	O
removed	O
in	O
the	O
release	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
10.5	I-Application
Leopard	I-Application
in	O
2007	O
.	O
</s>
<s>
The	O
Sherlock	B-Operating_System
2	O
search	O
plugin	O
was	O
an	O
SGML	B-Language
document	O
,	O
and	O
was	O
typically	O
given	O
the	O
"	O
.src	O
"	O
file	O
extension	O
.	O
</s>
<s>
The	O
Sherlock	B-Operating_System
plug-in	O
was	O
composed	O
of	O
three	O
parts	O
,	O
identified	O
by	O
their	O
element	O
names	O
:	O
,	O
,	O
and	O
tags	O
.	O
</s>
<s>
These	O
elements	O
allowed	O
Sherlock	B-Operating_System
to	O
(	O
respectively	O
)	O
identify	O
a	O
search	B-Application
engine	I-Application
's	O
web	O
page	O
and	O
the	O
parts	O
that	O
are	O
relevant	O
to	O
searching	O
,	O
as	O
well	O
as	O
returning	O
the	O
results	O
of	O
the	O
search	O
.	O
</s>
<s>
There	O
was	O
also	O
a	O
facility	O
for	O
defining	O
how	O
a	O
Sherlock	B-Operating_System
plug-in	O
could	O
update	O
itself	O
.	O
</s>
<s>
Sherlock	B-Operating_System
search	O
plugins	O
could	O
also	O
be	O
used	O
(	O
with	O
minor	O
modifications	O
)	O
in	O
Mozilla	B-Operating_System
's	O
browser	O
suites	O
.	O
</s>
<s>
These	O
plugins	O
were	O
,	O
appropriately	O
enough	O
,	O
known	O
as	O
Mycroft	O
project	O
plugins	O
(	O
named	O
after	O
Mycroft	O
Holmes	O
,	O
Sherlock	B-Application
Holmes	I-Application
 '	O
older	O
brother	O
)	O
.	O
</s>
<s>
Among	O
some	O
of	O
the	O
changes	O
made	O
in	O
the	O
Sherlock	B-Operating_System
file	O
format	O
were	O
the	O
separation	O
of	O
the	O
automatic	O
update	O
element	O
(	O
which	O
formed	O
part	O
of	O
the	O
element	O
)	O
and	O
the	O
icon	O
(	O
provided	O
in	O
a	O
separate	O
file	O
in	O
Mozilla	B-Operating_System
and	O
part	O
of	O
the	O
resource	B-Operating_System
fork	I-Operating_System
in	O
Sherlock	B-Operating_System
)	O
.	O
</s>
<s>
The	O
Sherlock	B-Operating_System
3	I-Operating_System
search	O
plugin	O
was	O
a	O
web	O
application	O
,	O
which	O
was	O
downloaded	O
on	O
the	O
fly	O
from	O
a	O
server	O
to	O
ensure	O
the	O
most	O
current	O
version	O
.	O
</s>
<s>
A	O
channel	O
consisted	O
of	O
a	O
web	B-Application
directory	I-Application
with	O
an	O
index	O
.	O
</s>
<s>
This	O
usually	O
pointed	O
to	O
a	O
sub-directory	O
(	O
usually	O
called	O
"	O
Channel	O
"	O
)	O
which	O
contained	O
the	O
code	O
XML	B-Protocol
,	O
any	O
Script	O
XML	B-Protocol
,	O
and	O
localized	O
lproj	O
directories	O
(	O
nib	O
file	O
and	O
Localized	O
Text	O
Resources	O
as	O
a	O
plist	O
)	O
.	O
</s>
<s>
As	O
Sherlock	B-Operating_System
was	O
never	O
released	O
as	O
a	O
Universal	B-Operating_System
binary	I-Operating_System
,	O
it	O
is	O
not	O
compatible	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
versions	O
after	O
Mac	B-Device
OS	I-Device
X	I-Device
10.6	I-Device
Snow	I-Device
Leopard	I-Device
and	O
could	O
n't	O
be	O
launched	O
on	O
Intel	O
Macs	O
without	O
Rosetta	B-Operating_System
.	O
</s>
<s>
Advocates	O
of	O
Watson	B-Application
made	O
by	O
Karelia	O
Software	O
,	O
LLC	O
claim	O
that	O
Apple	O
copied	O
their	O
product	O
without	O
permission	O
,	O
compensation	O
,	O
or	O
attribution	O
in	O
producing	O
Sherlock	B-Operating_System
3	I-Operating_System
.	O
</s>
<s>
Some	O
disagree	O
with	O
this	O
claim	O
,	O
stating	O
that	O
Sherlock	B-Operating_System
3	I-Operating_System
was	O
the	O
natural	O
evolution	O
of	O
Sherlock	B-Operating_System
2	O
,	O
and	O
that	O
Watson	B-Application
was	O
obviously	O
meant	O
to	O
have	O
some	O
relation	O
to	O
Sherlock	B-Operating_System
by	O
its	O
very	O
name	O
.	O
</s>
<s>
Sherlock	B-Operating_System
–	O
introduced	O
in	O
Mac	B-Operating_System
OS	I-Operating_System
8.5	I-Operating_System
.	O
</s>
<s>
Sherlock	B-Operating_System
2	O
–	O
shipped	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
,	O
new	O
interface	O
,	O
more	O
plugins	O
.	O
</s>
<s>
Sherlock	B-Operating_System
3	I-Operating_System
–	O
shipped	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.2	I-Operating_System
,	O
runs	O
only	O
in	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
Sherlock	B-Operating_System
was	O
replaced	O
by	O
Spotlight	B-Application
in	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
Tiger	I-Application
for	O
hard	O
drive	O
searches	O
,	O
and	O
replaced	O
by	O
Dashboard	B-Application
for	O
other	O
functionality	O
,	O
but	O
remained	O
as	O
a	O
stand-alone	O
program	O
with	O
its	O
channels	O
.	O
</s>
<s>
It	O
was	O
completely	O
removed	O
in	O
Mac	B-Application
OS	I-Application
X	I-Application
10.5	I-Application
Leopard	I-Application
.	O
</s>
