<s>
Umbraco	B-Protocol
is	O
an	O
open-source	B-Application
content	B-Protocol
management	I-Protocol
system	I-Protocol
(	O
CMS	B-Protocol
)	O
platform	O
for	O
publishing	O
content	O
on	O
the	O
World	O
Wide	O
Web	O
and	O
intranets	B-General_Concept
.	O
</s>
<s>
It	O
is	O
written	O
in	O
C#	B-Application
and	O
deployed	O
on	O
Microsoft	O
based	O
infrastructure	O
.	O
</s>
<s>
Since	O
version	O
4.5	O
,	O
the	O
whole	O
system	O
has	O
been	O
available	O
under	O
an	O
MIT	B-License
License	I-License
.	O
</s>
<s>
Umbraco	B-Protocol
was	O
developed	O
by	O
Niels	O
Hartvig	O
in	O
2000	O
and	O
released	O
as	O
open	B-Application
source	I-Application
software	I-Application
in	O
2004	O
.	O
</s>
<s>
In	O
2009	O
,	O
CMS	B-Protocol
Wire	O
described	O
it	O
as	O
one	O
of	O
the	O
leading	O
.NET-based	O
open	O
source	O
CMS	B-Protocol
systems	O
.	O
</s>
<s>
In	O
2010	O
,	O
with	O
1000	O
downloads	O
a	O
day	O
,	O
Umbraco	B-Protocol
was	O
in	O
the	O
top	O
five	O
most	O
popular	O
downloads	O
via	O
the	O
Microsoft	B-Application
Web	I-Application
Platform	I-Application
Installer	I-Application
,	O
two	O
places	O
below	O
its	O
main	O
rival	O
DotNetNuke	B-Application
,	O
and	O
was	O
the	O
12th	O
most	O
downloaded	O
application	O
from	O
Codeplex	B-Protocol
,	O
six	O
places	O
below	O
DotNetNuke	B-Application
and	O
13	O
places	O
higher	O
than	O
mojoPortal	B-Application
.	O
</s>
<s>
Umbraco	B-Protocol
is	O
primarily	O
written	O
in	O
C#	B-Application
,	O
stores	O
data	O
in	O
a	O
relational	B-Application
database	I-Application
(	O
commonly	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
)	O
and	O
works	O
on	O
Microsoft	B-Application
IIS	I-Application
.	O
</s>
<s>
Umbraco	B-Protocol
's	O
front-end	B-Architecture
is	O
built	O
upon	O
Microsoft	B-Application
's	I-Application
.NET	I-Application
Framework	I-Application
,	O
using	O
ASP.NET	B-Application
Core	I-Application
.	O
</s>
<s>
Umbraco	B-Protocol
uses	O
standard	O
ASP.NET	O
features	O
such	O
as	O
ASP.NET	O
"	O
master	O
pages	O
"	O
to	O
facilitate	O
the	O
creation	O
of	O
reusable	O
page	O
layouts	O
,	O
and	O
supports	O
both	O
Razor	B-Application
and	O
XSLT	B-Application
.	O
</s>
<s>
In	O
2008	O
,	O
a	O
data	B-Application
abstraction	I-Application
layer	O
for	O
Umbraco	B-Protocol
was	O
built	O
,	O
making	O
it	O
possible	O
to	O
support	O
databases	O
other	O
than	O
SQL	B-Application
Server	I-Application
.	O
</s>
<s>
In	O
version	O
4.0	O
of	O
Umbraco	B-Protocol
,	O
support	O
for	O
MySQL	B-Application
,	O
SQL	B-Application
Server	I-Application
and	O
VistaDB	O
come	O
as	O
standard	O
.	O
</s>
<s>
With	O
Umbraco	B-Protocol
4.6	O
,	O
released	O
in	O
2010	O
,	O
VistaDB	O
support	O
was	O
removed	O
,	O
and	O
replaced	O
with	O
support	O
for	O
SQL	B-Application
Server	I-Application
Express	O
and	O
SQL	B-Application
Server	I-Application
Compact	O
Edition	O
,	O
due	O
to	O
licensing	O
issues	O
with	O
VistaDB	O
's	O
parent	O
company	O
.	O
</s>
<s>
As	O
of	O
Umbraco	B-Protocol
6	O
,	O
support	O
for	O
MySQL	B-Application
has	O
waned	O
,	O
as	O
the	O
development	O
team	O
has	O
spent	O
more	O
time	O
supporting	O
Microsoft	O
's	O
SQL	B-Application
Server	I-Application
products	O
.	O
</s>
<s>
MySQL	O
5.6.5	O
or	O
newer	O
is	O
required	O
to	O
support	O
Umbraco	B-Protocol
6.1	O
or	O
newer	O
.	O
</s>
<s>
Umbraco	B-Protocol
7	O
featured	O
a	O
completely	O
revamped	O
back-end	B-Architecture
administration	O
UI	O
,	O
with	O
the	O
use	O
of	O
AngularJS	B-Application
for	O
a	O
single-page	B-Application
application	I-Application
experience	O
.	O
</s>
<s>
The	O
standard	O
release	O
of	O
Umbraco	B-Protocol
is	O
typically	O
deployed	O
on	O
IIS	O
in	O
an	O
environment	O
which	O
supports	O
Full	O
Trust	O
.	O
</s>
<s>
While	O
a	O
Full	O
Trust	O
environment	O
is	O
mandatory	O
to	O
install	O
and	O
operate	O
the	O
standard	O
release	O
,	O
the	O
codebase	O
has	O
been	O
branched	O
and	O
modified	O
to	O
produce	O
a	O
version	O
of	O
the	O
framework	O
and	O
backend	B-Architecture
UI	O
which	O
supports	O
Medium	O
Trust	O
.	O
</s>
<s>
Research	O
has	O
also	O
been	O
undertaken	O
on	O
running	O
an	O
Umbraco	B-Protocol
website	O
on	O
Mono	B-Application
on	O
Linux	O
.	O
</s>
<s>
Umbraco	B-Protocol
can	O
be	O
deployed	O
on	O
a	O
single	O
physical	O
server	O
running	O
the	O
database	O
and	O
web	O
tier	O
,	O
and	O
this	O
deployment	O
model	O
can	O
be	O
appropriate	O
for	O
small	O
low-cost	O
sites	O
.	O
</s>
<s>
Umbraco	B-Protocol
sites	O
which	O
serve	O
content	O
under	O
higher	O
load	O
can	O
also	O
be	O
deployed	O
on	O
a	O
load	B-Application
balanced	I-Application
cluster	O
.	O
</s>
<s>
Load	B-Application
balanced	I-Application
Umbraco	B-Protocol
installations	O
can	O
use	O
software	O
or	O
hardware	O
load	B-Application
balancers	I-Application
,	O
and	O
load	B-Application
balanced	I-Application
network	O
files	O
can	O
be	O
shared	O
using	O
a	O
SAN	O
,	O
NAS	B-Application
or	O
a	O
cluster	B-Application
file	I-Application
system	I-Application
or	O
using	O
a	O
file	O
replication	O
service	O
between	O
nodes	O
in	O
the	O
cluster	O
.	O
</s>
<s>
Version	O
5	O
(	O
codenamed	O
"	O
Jupiter	O
"	O
)	O
is	O
a	O
rewrite	O
of	O
the	O
framework	O
,	O
built	O
using	O
ASP.NET	B-Language
MVC	I-Language
,	O
published	O
in	O
January	O
2012	O
.	O
</s>
<s>
Problems	O
(	O
performance	O
and	O
code	O
complexity	O
)	O
inherent	O
in	O
the	O
architecture	O
of	O
the	O
new	O
Version	O
5	O
data	O
access	O
layer	O
led	O
to	O
Version	O
5	O
being	O
dropped	O
in	O
June	O
2012	O
despite	O
having	O
been	O
released	O
on	O
a	O
commercial	O
license	O
,	O
and	O
development	O
efforts	O
refocused	O
on	O
integrating	O
selected	O
Version	O
5	O
front	B-Architecture
end	I-Architecture
enhancements	O
into	O
Version	O
4	O
.	O
</s>
<s>
Umbraco	B-Protocol
8	O
was	O
released	O
on	O
the	O
26th	O
of	O
February	O
,	O
2019	O
.	O
</s>
<s>
Umbraco	B-Protocol
9	O
was	O
released	O
on	O
the	O
28th	O
of	O
September	O
,	O
2021	O
.	O
</s>
<s>
This	O
marks	O
the	O
first	O
version	O
fully	O
on	O
.NET	B-Application
5	O
and	O
ASP.NET	B-Application
Core	I-Application
.	O
</s>
<s>
Umbraco	B-Protocol
10	O
was	O
released	O
on	O
the	O
16th	O
of	O
June	O
2022	O
.	O
</s>
<s>
This	O
release	O
brought	O
Umbraco	B-Protocol
to	O
.NET	B-Application
6	O
and	O
ASP.NET	B-Application
Core	I-Application
6	O
and	O
SQLite	B-Language
support	O
.	O
</s>
<s>
Umbraco	B-Protocol
11	O
was	O
released	O
on	O
the	O
1st	O
of	O
December	O
2022	O
.	O
</s>
<s>
This	O
release	O
brought	O
Umbraco	B-Protocol
to	O
.NET	B-Application
7	O
and	O
ASP.NET	B-Application
Core	I-Application
7	O
and	O
a	O
new	O
Block	O
Grid	O
Editor	O
.	O
</s>
<s>
2020	O
-	O
The	O
Umbraco	B-Protocol
corporation	O
employs	O
over	O
70	O
staff	O
and	O
is	O
supported	O
by	O
a	O
core	O
team	O
of	O
over	O
15	O
developers	O
who	O
work	O
on	O
the	O
open	O
source	O
core	O
platform	O
.	O
</s>
<s>
Umbraco	B-Protocol
's	O
community	O
site	O
,	O
"	O
Our	O
Umbraco	B-Protocol
"	O
,	O
has	O
more	O
than	O
200,000	O
registered	O
users	O
and	O
developers	O
.	O
</s>
<s>
In	O
August	O
2009	O
,	O
Umbraco	B-Protocol
was	O
included	O
in	O
a	O
list	O
of	O
10	O
CMS	B-Protocol
platforms	O
recommended	O
by	O
the	O
Danish	O
Version2	O
magazine	O
.	O
</s>
<s>
Among	O
these	O
were	O
three	O
systems	O
initially	O
developed	O
in	O
Denmark	O
:	O
Sitecore	O
,	O
TYPO3	B-Protocol
,	O
and	O
Umbraco	B-Protocol
.	O
</s>
