<s>
The	O
Study	B-General_Concept
Archive	I-General_Concept
file	O
format	O
is	O
a	O
data	B-General_Concept
compression	I-General_Concept
and	O
archive	B-Application
format	O
,	O
based	O
directly	O
on	O
the	O
ZIP	B-General_Concept
file	I-General_Concept
format	I-General_Concept
.	O
</s>
<s>
Study	B-General_Concept
archives	I-General_Concept
are	O
intended	O
for	O
the	O
development	O
and	O
use	O
of	O
sets	O
of	O
interactive	O
flashcards	O
,	O
which	O
may	O
contain	O
not	O
only	O
text	O
but	O
also	O
images	O
and	O
audio	O
files	O
,	O
in	O
various	O
applications	O
.	O
</s>
<s>
The	O
format	O
was	O
created	O
in	O
2011	O
by	O
The	O
Mental	O
Faculty	O
,	O
made	O
for	O
use	O
with	O
its	O
series	O
of	O
flashcard	O
applications	O
for	O
the	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
iOS	B-Operating_System
platforms	O
,	O
but	O
intended	O
to	O
be	O
a	O
cross-platform	O
format	O
compatible	O
with	O
other	O
applications	O
,	O
to	O
allow	O
for	O
ease	O
of	O
import/export	O
and	O
portability	O
.	O
</s>
<s>
Study	B-General_Concept
archives	I-General_Concept
are	O
collections	O
of	O
data	O
(	O
in	O
CSV	O
and/or	O
TSV	B-Protocol
files	O
)	O
,	O
images	O
,	O
and	O
audio	O
files	O
,	O
arranged	O
in	O
an	O
organized	O
hierarchical	O
directory	O
structure	O
and	O
packaged	O
in	O
a	O
compressed	O
ZIP	B-General_Concept
archive	I-General_Concept
for	O
use	O
with	O
flashcard	O
applications	O
.	O
</s>
<s>
The	O
standard	O
hierarchal	O
structure	O
for	O
study	B-General_Concept
archives	I-General_Concept
is	O
illustrated	O
in	O
the	O
following	O
example	O
:	O
</s>
<s>
The	O
study	B-General_Concept
archive	I-General_Concept
documentation	O
also	O
defines	O
a	O
URL	O
protocol	O
for	O
study	B-General_Concept
archives	I-General_Concept
on	O
the	O
Internet	O
to	O
be	O
directly	O
opened	O
in	O
a	O
supporting	O
application	O
.	O
</s>
<s>
The	O
protocol	O
simply	O
replaces	O
with	O
in	O
a	O
standard	O
direct	O
link	O
to	O
a	O
given	O
study	B-General_Concept
archive	I-General_Concept
file	O
.	O
</s>
