<s>
XOOPS	B-Operating_System
is	O
a	O
free	B-Application
open-source	B-Application
content	B-Protocol
management	I-Protocol
system	I-Protocol
(	O
CMS	O
)	O
,	O
written	O
in	O
PHP	B-Application
.	O
</s>
<s>
It	O
uses	O
a	O
modular	B-Architecture
architecture	I-Architecture
allowing	O
users	O
to	O
customize	O
,	O
update	O
and	O
theme	O
their	O
websites	O
.	O
</s>
<s>
XOOPS	B-Operating_System
is	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
and	O
is	O
free	B-Application
to	O
use	O
,	O
modify	O
and	O
redistribute	O
.	O
</s>
<s>
XOOPS	B-Operating_System
is	O
an	O
acronym	O
of	O
"	O
eXtensible	O
Object	O
Oriented	O
Portal	O
System	O
"	O
.	O
</s>
<s>
Though	O
started	O
as	O
a	O
portal	O
system	O
,	O
it	O
later	O
developed	O
into	O
a	O
web	B-Application
application	I-Application
framework	I-Application
.	O
</s>
<s>
It	O
aims	O
to	O
serve	O
as	O
a	O
web	B-Application
framework	I-Application
for	O
use	O
by	O
small	O
,	O
medium	O
and	O
large	O
sites	O
,	O
through	O
the	O
installation	O
of	O
modules	B-Architecture
.	O
</s>
<s>
For	O
example	O
,	O
a	O
small	O
XOOPS	B-Operating_System
installation	O
can	O
be	O
used	O
as	O
a	O
personal	O
weblog	O
or	O
journal	O
,	O
but	O
this	O
can	O
be	O
expanded	O
upon	O
and	O
customized	O
,	O
i.e.	O
</s>
<s>
users	O
might	O
add	O
the	O
appropriate	O
modules	B-Architecture
(	O
freeware	O
and	O
commercial	O
)	O
to	O
store	O
content	O
in	O
news	O
,	O
forums	O
,	O
downloads	O
,	O
and	O
others	O
.	O
</s>
<s>
Books	O
have	O
been	O
written	O
about	O
XOOPS	B-Operating_System
in	O
five	O
languages	O
.	O
</s>
<s>
2008	O
Top	O
5	O
in	O
Packt	O
Publishing	O
's	O
"	O
Best	O
PHP	B-Application
Open	O
Source	O
CMS	O
"	O
and	O
was	O
Top-5	O
finalist	O
in	O
2009	O
Best	O
Overall	O
CMS	O
Award	O
category	O
.	O
</s>
<s>
Onokazu	O
,	O
a	O
founder	O
of	O
XOOPS	B-Operating_System
and	O
Taiwen	O
Jiang	O
,	O
Development	O
Lead	O
,	O
won	O
the	O
title	O
of	O
"	O
Open	O
Source	O
CMS	O
Most	O
Valued	O
People	O
"	O
at	O
the	O
Packt	O
awards	O
in	O
2008	O
and	O
2009	O
respectively	O
.	O
</s>
<s>
Community	O
Because	O
XOOPS	B-Operating_System
is	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
the	O
growth	O
and	O
development	O
of	O
XOOPS	B-Operating_System
is	O
dependent	O
on	O
the	O
contributions	O
of	O
a	O
worldwide	O
community	O
effort	O
.	O
</s>
<s>
Database	O
XOOPS	B-Operating_System
uses	O
a	O
relational	B-Application
database	I-Application
(	O
currently	O
MySQL	B-Application
)	O
to	O
store	O
data	O
required	O
for	O
running	O
a	O
web-based	O
content	B-Protocol
management	I-Protocol
system	I-Protocol
.	O
</s>
<s>
Modularized	O
Modules	B-Architecture
can	O
be	O
installed	O
,	O
uninstalled	O
,	O
activated	O
,	O
and	O
deactivated	O
using	O
the	O
module	B-Architecture
administration	O
system	O
.	O
</s>
<s>
Core	O
features	O
usable	O
by	O
modules	B-Architecture
XOOPS	B-Operating_System
possess	O
a	O
number	O
of	O
core	O
features	O
that	O
can	O
be	O
used	O
by	O
modules	B-Architecture
like	O
permissions	O
,	O
comments	O
,	O
notifications	O
and	O
blocks	O
features	O
.	O
</s>
<s>
International	O
language	O
support	O
The	O
XOOPS	B-Operating_System
community	O
has	O
official	O
support	O
sites	O
for	O
non-English-speaking	O
users	O
.	O
</s>
<s>
Additionally	O
XOOPS	B-Operating_System
itself	O
supports	O
multi-byte	O
character	O
sets	O
for	O
languages	O
that	O
use	O
characters	O
not	O
in	O
the	O
Latin	O
alphabet	O
,	O
for	O
example	O
Japanese	O
,	O
Simplified	O
and	O
Traditional	O
Chinese	O
,	O
Korean	O
,	O
etc	O
.	O
</s>
<s>
The	O
multi-language	O
support	O
is	O
also	O
available	O
on	O
the	O
PDF	O
generation	O
feature	O
provided	O
by	O
the	O
TCPDF	B-Language
library	O
.	O
</s>
<s>
Theme-based	O
skinnable	O
interface	O
XOOPS	B-Operating_System
uses	O
themes	O
for	O
page	O
presentation	O
.	O
</s>
<s>
Templates	O
XOOPS	B-Operating_System
uses	O
the	O
Smarty	B-Language
templating	O
engine	O
which	O
allows	O
many	O
benefits	O
such	O
as	O
easier	O
separation	O
between	O
business	O
logic	O
and	O
presentation	O
logic	O
as	O
well	O
as	O
content	O
caching	O
.	O
</s>
<s>
Some	O
SEO	O
add-ons	O
A	O
number	O
of	O
XOOPS	B-Operating_System
modules	B-Architecture
contain	O
features	O
to	O
facilitate	O
the	O
indexing	O
of	O
a	O
website	O
in	O
search	B-Application
engines	I-Application
,	O
like	O
metatags	O
,	O
title	O
tags	O
and	O
occasionally	O
some	O
URL	B-Protocol
rewriting	I-Protocol
.	O
</s>
<s>
However	O
,	O
XOOPS	B-Operating_System
does	O
not	O
give	O
its	O
users	O
full	O
control	O
over	O
their	O
URLs	O
.	O
</s>
<s>
Where	O
URL	B-Protocol
rewriting	I-Protocol
is	O
possible	O
,	O
XOOPS	B-Operating_System
often	O
uses	O
redirects	O
that	O
may	O
confuse	O
search	B-Application
engines	I-Application
.	O
</s>
<s>
In	O
addition	O
,	O
some	O
XOOPS	B-Operating_System
modules	B-Architecture
create	O
duplicate	O
content	O
by	O
making	O
the	O
same	O
information	O
available	O
on	O
more	O
than	O
one	O
URL	O
while	O
in	O
other	O
cases	O
(	O
especially	O
in	O
case	O
of	O
multilingual	O
sites	O
)	O
,	O
several	O
sets	O
of	O
content	O
may	O
be	O
made	O
available	O
through	O
the	O
same	O
URL	O
.	O
</s>
