<s>
Samvera	B-Application
,	O
originally	O
known	O
as	O
Hydra	B-Application
,	O
is	O
an	O
open-source	B-Application
digital	O
repository	O
software	O
product	O
.	O
</s>
<s>
Samvera	B-Application
main	O
components	O
are	O
Fedora	B-Application
Commons	I-Application
,	O
Solr	B-Language
,	O
Blacklight	B-Application
,	O
and	O
HydraHead	O
(	O
a	O
Ruby	B-Application
on	I-Application
Rails	I-Application
plugin	O
and	O
gem	B-Application
,	O
respectively	O
)	O
.	O
</s>
<s>
Each	O
Samvera	B-Application
implementation	O
is	O
called	O
a	O
"	O
head	O
"	O
.	O
</s>
<s>
The	O
software	O
was	O
developed	O
as	O
a	O
collaboration	O
between	O
Stanford	O
University	O
,	O
the	O
University	O
of	O
Virginia	O
,	O
the	O
University	O
of	O
Hull	O
,	O
and	O
Fedora	B-Application
Commons	I-Application
.	O
</s>
<s>
In	O
May	O
2017	O
,	O
the	O
project	O
began	O
discontinuing	O
use	O
of	O
the	O
Hydra	B-Application
name	O
and	O
announced	O
that	O
the	O
"	O
Hydra	B-Application
Project	O
"	O
would	O
become	O
the	O
"	O
Samvera	B-Application
Community.	O
"	O
</s>
<s>
The	O
original	O
collaborators	O
,	O
plus	O
some	O
newer	O
members	O
,	O
form	O
the	O
Samvera	B-Application
Steering	O
Group	O
.	O
</s>
<s>
The	O
Samvera	B-Application
developers	O
group	O
is	O
the	O
third	O
group	O
and	O
is	O
made	O
up	O
of	O
contributors	O
to	O
the	O
Samvera	B-Application
software	O
.	O
</s>
<s>
Samvera	B-Application
is	O
primarily	O
used	O
in	O
libraries	O
and	O
digital	O
repositories	O
.	O
</s>
<s>
Samvera	B-Application
implements	O
the	O
Opinionated	O
Metadata	O
gem	B-Application
to	O
create	O
domain-specific	B-Language
languages	I-Language
out	O
of	O
complex	O
XML	O
standards	O
such	O
as	O
MODS	O
.	O
</s>
<s>
Other	O
metadata	O
standards	O
,	O
such	O
as	O
Dublin	O
Core	O
and	O
Encoded	O
Archival	O
Description	O
(	O
EAD	O
)	O
,	O
are	O
also	O
employed	O
in	O
Samvera	B-Application
implementations	O
.	O
</s>
<s>
Samvera	B-Application
allows	O
storage	O
of	O
any	O
type	O
of	O
digital	O
files	O
for	O
the	O
purposes	O
of	O
access	O
and/or	O
digital	O
archiving	O
.	O
</s>
<s>
The	O
concept	O
of	O
Samvera	B-Application
"	O
heads	O
"	O
is	O
unique	O
to	O
this	O
repository	O
software	O
.	O
</s>
<s>
Each	O
head	O
is	O
a	O
Ruby	B-Application
on	I-Application
Rails	I-Application
application	O
that	O
provides	O
a	O
user	O
experience	O
and	O
set	O
of	O
specific	O
functionalities	O
to	O
a	O
certain	O
user	O
community	O
using	O
content	O
and	O
metadata	O
(	O
the	O
body	O
,	O
with	O
the	O
content	O
residing	O
in	O
Fedora	B-Application
and	O
the	O
metadata	O
residing	O
in	O
Solr	B-Language
)	O
that	O
may	O
be	O
shared	O
with	O
other	O
such	O
heads	O
.	O
</s>
<s>
For	O
example	O
,	O
a	O
faculty	O
member	O
may	O
use	O
a	O
certain	O
Samvera	B-Application
head	O
to	O
crop	O
,	O
fine-tune	O
,	O
and	O
submit	O
a	O
set	O
of	O
images	O
that	O
is	O
relevant	O
to	O
their	O
research	O
.	O
</s>
<s>
A	O
casual	O
user	O
may	O
use	O
a	O
different	O
Samvera	B-Application
head	O
to	O
browse	O
these	O
images	O
without	O
the	O
clutter	O
of	O
all	O
the	O
photo	O
editing	O
and	O
submission	O
capabilities	O
.	O
</s>
<s>
Finally	O
,	O
a	O
librarian	O
user	O
may	O
access	O
yet	O
another	O
Samvera	B-Application
head	O
to	O
curate	O
an	O
online	O
exhibit	O
of	O
research	O
at	O
their	O
University	O
,	O
using	O
the	O
photographs	O
submitted	O
by	O
the	O
faculty	O
member	O
but	O
employing	O
a	O
special	O
curatorial	O
interface	O
.	O
</s>
<s>
Samvera	B-Application
has	O
been	O
modified	O
to	O
meet	O
special	O
needs	O
,	O
such	O
as	O
the	O
development	O
of	O
GeoHydra	O
at	O
Stanford	O
University	O
.	O
</s>
<s>
Due	O
to	O
its	O
extensive	O
list	O
of	O
dependencies	B-Application
,	O
Samvera	B-Application
is	O
difficult	O
for	O
smaller	O
institutions	O
to	O
implement	O
.	O
</s>
<s>
To	O
make	O
this	O
software	O
more	O
feasible	O
for	O
such	O
institutions	O
,	O
the	O
Digital	O
Public	O
Library	O
of	O
America	O
,	O
Stanford	O
University	O
,	O
and	O
DuraSpace	O
partnered	O
on	O
a	O
grant	O
project	O
from	O
the	O
Institute	O
for	O
Museum	O
and	O
Library	O
Services	O
called	O
"	O
Hydra-in-a-box	O
"	O
.	O
</s>
<s>
The	O
goal	O
of	O
this	O
project	O
is	O
to	O
extend	O
the	O
Hydra	B-Application
codebase	O
to	O
"	O
build	O
,	O
bundle	O
,	O
and	O
promote	O
a	O
feature-rich	O
,	O
robust	O
,	O
flexible	O
digital	O
repository	O
that	O
is	O
easy	O
to	O
install	O
,	O
configure	O
,	O
and	O
maintain.	O
"	O
</s>
<s>
In	O
2017	O
,	O
Hyku	O
entered	O
beta	O
,	O
and	O
in	O
February	O
2019	O
,	O
it	O
was	O
promoted	O
out	O
of	O
Samvera	B-Application
Labs	O
.	O
</s>
<s>
Ongoing	O
development	O
of	O
Hyku	O
is	O
guided	O
by	O
the	O
Samvera	B-Application
community	O
via	O
the	O
and	O
associated	O
partners	O
.	O
</s>
<s>
There	O
are	O
projects	O
in	O
Samvera	B-Application
Community	O
to	O
develop	O
Hyku	O
repository	O
application	O
further	O
for	O
existing	O
and	O
potential	O
adopters	O
.	O
</s>
<s>
Advancing	O
Hyku	O
is	O
a	O
collaborative	O
project	O
to	O
support	O
the	O
growth	O
of	O
open	O
access	O
through	O
institutional	O
repositories	O
,	O
by	O
introducing	O
significant	O
structural	O
improvements	O
and	O
new	O
features	O
to	O
the	O
Samvera	B-Application
Community	O
’s	O
Hyku	O
platform	O
.	O
</s>
