<s>
Extended	B-Application
Window	I-Application
Manager	I-Application
Hints	I-Application
,	O
a.k.a.	O
</s>
<s>
NetWM	B-Application
,	O
is	O
an	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
standard	O
for	O
the	O
communication	O
between	O
window	B-Application
managers	I-Application
and	O
applications	B-Application
.	O
</s>
<s>
It	O
builds	O
on	O
the	O
functionality	O
of	O
the	O
Inter-Client	B-Operating_System
Communication	I-Operating_System
Conventions	I-Operating_System
Manual	I-Operating_System
(	O
ICCCM	B-Operating_System
)	O
.	O
</s>
<s>
These	O
standards	O
formulate	O
protocols	O
for	O
the	O
mediation	O
of	O
access	O
to	O
shared	O
X	B-Operating_System
resources	O
,	O
like	O
the	O
screen	B-Device
and	O
the	O
input	O
focus	O
.	O
</s>
<s>
Applications	B-Application
request	O
access	O
,	O
while	O
the	O
window	O
manager	O
grants	O
or	O
denies	O
it	O
.	O
</s>
<s>
Communication	O
occurs	O
via	O
X	B-Operating_System
properties	O
and	O
client	O
messages	O
.	O
</s>
<s>
The	O
EWMH	B-Application
is	O
a	O
comprehensive	O
set	O
of	O
protocols	O
to	O
implement	O
a	O
desktop	O
environment	O
.	O
</s>
<s>
The	O
window	O
manager	O
may	O
choose	O
to	O
implement	O
virtual	B-Application
desktops	I-Application
or	O
a	O
layered	B-Device
stacking	I-Device
order	I-Device
,	O
but	O
if	O
it	O
does	O
,	O
then	O
the	O
EWMH	B-Application
defines	O
how	O
this	O
is	O
communicated	O
.	O
</s>
<s>
The	O
WM	O
must	O
update	O
a	O
set	O
of	O
properties	O
on	O
the	O
root	B-Device
window	I-Device
:	O
</s>
<s>
_NET_SUPPORTED	O
lists	O
all	O
the	O
EWMH	B-Application
protocols	O
supported	O
by	O
this	O
WM	O
.	O
</s>
<s>
_NET_NUMBER_OF_DESKTOPS	O
indicates	O
the	O
number	O
of	O
virtual	B-Application
desktops	I-Application
.	O
</s>
<s>
_NET_DESKTOP_NAMES	O
lists	O
the	O
names	O
of	O
all	O
virtual	B-Application
desktops	I-Application
.	O
</s>
<s>
_NET_VIRTUAL_ROOTS	O
if	O
the	O
WM	O
supports	O
virtual	O
root	B-Device
windows	I-Device
.	O
</s>
<s>
_NET_DESKTOP_LAYOUT	O
shows	O
the	O
layout	O
of	O
the	O
active	O
pager	B-Application
.	O
</s>
<s>
If	O
the	O
WM	O
supports	O
virtual	B-Application
desktops	I-Application
:	O
</s>
<s>
The	O
EWMH	B-Application
defines	O
these	O
application	O
window	O
properties	O
:	O
</s>
<s>
_NET_WM_STRUT_PARTIAL	O
reserved	O
space	O
details	O
at	O
the	O
screen	B-Device
edge	O
.	O
</s>
<s>
_NET_WM_HANDLED_ICONS	O
whether	O
a	O
pager	B-Application
provides	O
icons	O
.	O
</s>
<s>
The	O
ICCCM	B-Operating_System
defines	O
only	O
three	O
distinct	O
states	O
a	O
window	O
can	O
be	O
in	O
:	O
</s>
<s>
The	O
EWMH	B-Application
defines	O
thirteen	O
window	O
state	O
flags	O
:	O
</s>
<s>
SkipPager	O
:	O
the	O
window	O
should	O
not	O
be	O
shown	O
on	O
a	O
pager	B-Application
,	O
</s>
<s>
Sticky	O
:	O
the	O
window	O
should	O
be	O
shown	O
on	O
all	O
virtual	B-Application
desktops	I-Application
.	O
</s>
