<s>
Silverstripe	B-Application
CMS	I-Application
is	O
a	O
free	B-License
and	I-License
open	I-License
source	I-License
content	B-Protocol
management	I-Protocol
system	I-Protocol
(	O
CMS	O
)	O
and	O
framework	O
for	O
creating	O
and	O
maintaining	O
websites	O
and	O
web	B-Application
applications	I-Application
.	O
</s>
<s>
It	O
provides	O
an	O
out	O
of	O
the	O
box	O
web-based	B-Application
administration	O
panel	O
that	O
enables	O
users	O
to	O
make	O
modifications	O
to	O
parts	O
of	O
the	O
website	O
,	O
which	O
includes	O
a	O
WYSIWYG	B-Application
website	O
editor	O
.	O
</s>
<s>
The	O
core	O
of	O
the	O
software	O
is	O
Silverstripe	B-Application
Framework	O
,	O
a	O
PHP	B-Application
Web	B-Application
application	I-Application
framework	I-Application
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
is	O
released	O
under	O
the	O
terms	O
of	O
the	O
BSD	B-Operating_System
License	I-Operating_System
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
separates	O
the	O
roles	O
of	O
:	O
</s>
<s>
The	O
Silverstripe	B-Application
CMS	I-Application
approach	O
allegedly	O
removes	O
complexity	O
for	O
content	O
authors	O
,	O
and	O
offers	O
more	O
flexibility	O
to	O
developers	O
.	O
</s>
<s>
The	O
core	O
of	O
Silverstripe	B-Application
CMS	I-Application
is	O
named	O
Silverstripe	B-Application
Framework	O
(	O
formerly	O
referred	O
to	O
as	O
"	O
Sapphire	O
"	O
)	O
.	O
</s>
<s>
As	O
with	O
the	O
rest	O
of	O
the	O
platform	O
,	O
it	O
is	O
written	O
in	O
PHP	B-Application
(	O
5.3	O
)	O
,	O
and	O
takes	O
advantage	O
of	O
its	O
object-oriented	B-Language
design	O
capabilities	O
such	O
as	O
name-spacing	O
.	O
</s>
<s>
The	O
Silverstripe	B-Application
Framework	O
provides	O
website	O
developers	O
a	O
framework	O
to	O
build	O
and	O
extend	O
websites	O
based	O
on	O
modern	O
programming	O
techniques	O
including	O
the	O
model-view-controller	O
pattern	O
and	O
object-relational	B-General_Concept
mapper	I-General_Concept
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
generates	O
markup	O
using	O
a	O
custom	O
template-language	O
based	O
on	O
W3C	O
HTML5	B-Application
that	O
offers	O
simple	O
placeholders	O
and	O
conditional	O
logic	O
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
is	O
extensible	O
through	O
modules	O
,	O
widgets	O
,	O
themes	O
and	O
code	O
customization	O
.	O
</s>
<s>
Notable	O
features	O
of	O
the	O
Silverstripe	B-Application
CMS	I-Application
include	O
:	O
</s>
<s>
Data	O
object	O
model	O
,	O
database	O
generation	O
through	O
object-relational	B-General_Concept
mapping	I-General_Concept
,	O
suite	O
of	O
customizable	O
data	O
input	O
controls	O
.	O
</s>
<s>
asset	O
management	O
,	O
image	B-Algorithm
resizing	I-Algorithm
,	O
drag&drop	O
images	O
from	O
OS	O
desktop	O
to	O
upload	O
.	O
</s>
<s>
Internationalization/Languages	O
:	O
Silverstripe	B-Application
CMS	I-Application
supports	O
multiple-language	O
content	O
.	O
</s>
<s>
Cross-platform	B-Operating_System
:	O
OS	O
(	O
Linux	O
,	O
Windows	O
,	O
Mac	O
)	O
,	O
Web	O
server	O
(	O
Apache	B-Application
,	O
IIS	B-Application
)	O
,	O
Database	O
(	O
MySQL	B-Application
,	O
PostgreSQL	B-Application
,	O
Microsoft	O
SQL	O
Server	O
fully	O
supported	O
;	O
SQLite	O
and	O
Oracle	O
Database	O
have	O
limited	O
support	O
.	O
)	O
</s>
<s>
Notable	O
features	O
of	O
upcoming	O
releases	O
of	O
Silverstripe	B-Application
CMS	I-Application
include	O
:	O
</s>
<s>
Complete	O
transition	O
to	O
jQuery	B-Language
library	I-Language
(	O
currently	O
uses	O
jQuery	B-Language
with	O
a	O
mixture	O
of	O
older	O
JavaScript	B-Application
frameworks	I-Application
.	O
)	O
</s>
<s>
Common	O
CMS	O
features	O
not	O
currently	O
available	O
in	O
Silverstripe	B-Application
CMS	I-Application
include	O
:	O
</s>
<s>
Modules	O
can	O
be	O
used	O
to	O
extend	O
the	O
core	O
functionality	O
of	O
Silverstripe	B-Application
CMS	I-Application
.	O
</s>
<s>
Modules	O
are	O
available	O
from	O
the	O
Silverstripe	B-Application
CMS	I-Application
modules	O
repository	O
,	O
which	O
as	O
of	O
October	O
2022	O
,	O
lists	O
over	O
3000	O
modules	O
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
Widgets	O
are	O
small	O
pieces	O
of	O
functionality	O
that	O
can	O
be	O
drag-and-dropped	O
into	O
Silverstripe	B-Application
CMS	I-Application
modules	O
(	O
notably	O
the	O
blog	O
module	O
)	O
.	O
</s>
<s>
The	O
Silverstripe	B-Application
CMS	I-Application
themes	O
directory	O
provides	O
a	O
number	O
of	O
community-contributed	O
,	O
freely	O
available	O
themes	O
(	O
114	O
as	O
of	O
October	O
2022	O
)	O
.	O
</s>
<s>
Modules	O
,	O
widgets	O
,	O
and	O
themes	O
are	O
all	O
available	O
as	O
free	O
downloads	O
under	O
the	O
BSD	B-Operating_System
license	I-Operating_System
,	O
and	O
the	O
majority	O
of	O
them	O
are	O
community	O
contributed	O
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
is	O
a	O
web	B-Application
application	I-Application
,	O
requiring	O
a	O
compatible	O
web	O
server	O
and	O
SQL	O
database	O
.	O
</s>
<s>
As	O
of	O
version	O
4.12.	O
,	O
the	O
requirements	O
for	O
Silverstripe	B-Application
CMS	I-Application
are	O
as	O
follows	O
:	O
</s>
<s>
Apache	B-Application
v2.4	O
,	O
Lighttpd	B-Protocol
,	O
Nginx	B-Operating_System
or	O
Microsoft	B-Application
IIS	I-Application
7.x	O
+	O
(	O
A	O
URL	O
Rewriter	O
is	O
required	O
.	O
</s>
<s>
PHP	B-Application
7.4	O
+	O
with	O
PHP	B-Application
extensions	O
:	O
ctype	O
,	O
dom	O
,	O
fileinfo	O
,	O
hash	O
,	O
intl	O
,	O
mbstring	O
,	O
session	O
,	O
simplexml	O
,	O
tokenizer	O
and	O
xml	O
.	O
</s>
<s>
The	O
gd	B-Language
or	O
imagick	B-Language
extension	O
for	O
image	O
manipulation	O
and	O
a	O
extension	O
for	O
a	O
database	O
connector	O
is	O
also	O
required	O
.	O
</s>
<s>
Silverstripe	B-Application
CMS	I-Application
is	O
released	O
under	O
the	O
terms	O
of	O
the	O
BSD	B-Operating_System
License	I-Operating_System
.	O
</s>
<s>
Two	O
technical	O
reference	O
books	O
on	O
Silverstripe	B-Application
CMS	I-Application
are	O
available	O
in	O
English	O
and	O
one	O
in	O
German	O
.	O
</s>
