<s>
The	O
Repository	B-Architecture
Open	I-Architecture
Service	I-Architecture
Interface	I-Architecture
Definition	I-Architecture
(	O
OSID	B-Architecture
)	O
is	O
an	O
Open	O
Knowledge	O
Initiative	O
specification	B-Application
which	O
defines	O
the	O
storing	O
and	O
retrieving	O
of	O
digital	O
content	O
,	O
referred	O
to	O
as	O
assets	O
.	O
</s>
<s>
OSIDs	B-Architecture
are	O
programmatic	O
interfaces	O
which	O
comprise	O
a	O
service-oriented	O
architecture	O
for	O
designing	O
and	O
building	O
reusable	B-Application
and	O
interoperable	O
software	O
.	O
</s>
<s>
Examples	O
of	O
assets	O
are	O
documents	O
,	O
course	O
materials	O
,	O
assessment	B-Architecture
items	O
,	O
images	O
,	O
video	O
,	O
etc	O
.	O
</s>
<s>
Multiple	O
repositories	O
can	O
be	O
managed	O
or	O
searched	O
through	O
the	O
use	O
of	O
OSID	B-Architecture
adapter	O
patterns	O
where	O
underneath	O
a	O
single	O
Repository	B-Architecture
OSID	I-Architecture
can	O
exist	O
multiple	O
Repository	B-Architecture
OSIDs	I-Architecture
forming	O
a	O
federation	O
of	O
repositories	O
,	O
where	O
each	O
implementation	O
may	O
be	O
using	O
a	O
distinct	O
incompatible	O
technology	O
and	O
the	O
OSID	B-Architecture
integrates	B-Architecture
them	O
.	O
</s>
