<s>
The	O
Lively	B-Language
Kernel	I-Language
is	O
an	O
open-source	B-Application
web	O
programming	O
environment	O
.	O
</s>
<s>
The	O
Lively	B-Language
Kernel	I-Language
is	O
a	O
graphical	O
composition	O
and	O
integrated	O
programming	O
environment	O
written	O
fully	O
in	O
the	O
programming	O
language	O
JavaScript	B-Language
using	O
standard	O
browser	O
graphics	O
(	O
W3C	O
Canvas	O
or	O
SVG	O
)	O
.	O
</s>
<s>
It	O
is	O
able	O
to	O
edit	O
its	O
own	O
code	O
and	O
graphics	O
,	O
and	O
through	O
its	O
built-in	O
WebDAV	B-Protocol
support	O
,	O
it	O
can	O
save	O
its	O
results	O
or	O
even	O
clone	O
itself	O
onto	O
new	O
web	O
pages	O
.	O
</s>
<s>
The	O
Lively	B-Language
Kernel	I-Language
uses	O
a	O
Morphic	O
graphics	O
model	O
to	O
add	O
behavior	O
to	O
a	O
scene	O
graph	O
built	O
from	O
browser	O
graphics	O
.	O
</s>
<s>
Content	O
can	O
vary	O
from	O
relatively	O
static	O
pages	O
of	O
text	O
to	O
fully	O
dynamic	O
models	O
that	O
look	O
and	O
behave	O
like	O
Adobe	B-Operating_System
Flash	I-Operating_System
simulations	O
.	O
</s>
<s>
The	O
Lively	B-Language
Kernel	I-Language
achieves	O
complex	O
dynamic	O
behavior	O
without	O
any	O
specific	O
animation	O
support	O
(	O
it	O
does	O
not	O
use	O
the	O
animation	O
features	O
of	O
SVG	O
)	O
,	O
but	O
by	O
simple	O
scheduling	O
of	O
multiple	O
green-thread	O
processes	O
in	O
JavaScript	B-Language
.	O
</s>
<s>
The	O
Lively	B-Language
Kernel	I-Language
includes	O
its	O
own	O
multifont	O
text	O
editor	O
written	O
in	O
JavaScript	B-Language
.	O
</s>
<s>
Working	O
in	O
Lively	O
thus	O
has	O
much	O
the	O
same	O
feel	O
as	O
working	O
in	O
a	O
web	O
page	O
design	O
program	O
,	O
except	O
that	O
the	O
on-the-fly	O
text	O
layout	O
is	O
not	O
being	O
done	O
in	O
an	O
offline	O
composition	O
program	O
,	O
but	O
it	O
is	O
the	O
built-in	O
dynamic	O
behavior	O
of	O
text	O
in	O
the	O
Lively	B-Language
Kernel	I-Language
.	O
</s>
<s>
The	O
Lively	B-Language
Kernel	I-Language
depends	O
on	O
browser	O
support	O
for	O
JavaScript	B-Language
and	O
SVG	O
or	O
Canvas	O
graphics	O
,	O
all	O
now	O
part	O
of	O
the	O
W3C	O
standards	O
.	O
</s>
<s>
As	O
of	O
2009	O
,	O
this	O
means	O
that	O
it	O
runs	O
in	O
Safari	B-Application
,	O
Firefox	B-Application
,	O
Chrome	B-Application
and	O
Opera	B-Application
browsers	I-Application
.	O
</s>
<s>
This	O
is	O
because	O
there	O
is	O
more	O
uniformity	O
among	O
JavaScript	B-Language
,	O
SVG	O
and	O
Canvas	O
implementations	O
than	O
there	O
is	O
from	O
one	O
HTML	O
implementation	O
to	O
another	O
.	O
</s>
<s>
Except	O
for	O
one	O
small	O
initial	O
file	O
,	O
the	O
Lively	B-Language
Kernel	I-Language
code	O
base	O
is	O
entirely	O
free	O
of	O
tests	O
for	O
which	O
client	O
browser	O
is	O
being	O
used	O
.	O
</s>
<s>
As	O
of	O
2011	O
,	O
Lively	B-Language
Kernel	I-Language
runs	O
best	O
in	O
WebKit-based	O
browsers	O
such	O
as	O
Safari	B-Application
for	O
Macintosh	O
,	O
or	O
Chromium	B-Language
or	O
Google	B-Application
Chrome	I-Application
for	O
Windows	O
.	O
</s>
<s>
Running	O
in	O
Internet	B-Application
Explorer	I-Application
(	O
Windows	O
)	O
requires	O
Google	B-Operating_System
Chrome	I-Operating_System
Frame	I-Operating_System
.	O
</s>
<s>
Lively	O
includes	O
an	O
integrated	O
development	O
environment	O
of	O
considerable	O
power	O
,	O
designed	O
to	O
work	O
via	O
WebDAV	B-Protocol
with	O
a	O
local	O
set	O
of	O
a	O
dozen	O
or	O
so	O
source	O
JavaScript	B-Language
files	O
synchronizable	O
with	O
a	O
versioned	O
repository	O
.	O
</s>
<s>
If	O
the	O
user	O
opens	O
a	O
SystemBrowser	O
,	O
all	O
the	O
JavaScript	B-Language
source	O
files	O
are	O
listed	O
in	O
the	O
file	O
pane	O
of	O
the	O
browser	O
.	O
</s>
<s>
If	O
the	O
user	O
clicks	O
on	O
one	O
of	O
these	O
files	O
,	O
it	O
will	O
be	O
read	O
,	O
parsed	O
(	O
by	O
an	O
OMeta	O
JavaScript	B-Language
parser	O
)	O
and	O
displayed	O
similar	O
to	O
a	O
Smalltalk	B-Application
browser	O
with	O
functions	O
or	O
class	O
definitions	O
listed	O
and	O
,	O
for	O
each	O
class	O
,	O
all	O
the	O
method	O
names	O
are	O
shown	O
.	O
</s>
<s>
The	O
new	O
definition	O
will	O
be	O
checked	O
for	O
syntax	O
and	O
,	O
if	O
correct	O
,	O
it	O
will	O
be	O
stored	O
back	O
in	O
the	O
.JS	B-Language
file	O
.	O
</s>
<s>
Because	O
Lively	O
includes	O
facilities	O
to	O
edit	O
the	O
content	O
in	O
its	O
worlds	O
(	O
scene	O
graphs	O
and	O
other	O
content	O
)	O
,	O
and	O
to	O
store	O
that	O
content	O
as	O
web	O
pages	O
,	O
a	O
WebDAV	B-Protocol
connection	O
allows	O
Lively	O
to	O
store	O
new	O
versions	O
of	O
its	O
page	O
content	O
while	O
it	O
is	O
being	O
incrementally	O
developed	O
.	O
</s>
<s>
All	O
that	O
is	O
required	O
is	O
a	O
server	O
providing	O
a	O
HTTP	O
WebDAV	B-Protocol
interface	O
.	O
</s>
<s>
Lively	O
for	O
Qt	B-Language
is	O
a	O
new	O
implementation	O
of	O
the	O
Lively	B-Language
Kernel	I-Language
in	O
which	O
the	O
"	O
kernel	O
"	O
parts	O
are	O
replaced	O
by	O
functionality	O
offered	O
by	O
the	O
Qt	B-Language
framework	I-Language
.	O
</s>
<s>
Lively	O
for	O
Qt	B-Language
inherits	O
most	O
of	O
the	O
basic	O
functionality	O
(	O
such	O
as	O
the	O
implementation	O
of	O
widgets	O
,	O
layout	O
management	O
,	O
core	O
event	O
handling	O
and	O
core	O
JavaScript	B-Language
support	O
)	O
from	O
Qt	B-Language
.	O
</s>
<s>
Lively	O
for	O
Qt	B-Language
retains	O
the	O
exceptionally	O
interactive	O
nature	O
(	O
the	O
"	O
liveliness	O
"	O
)	O
of	O
the	O
Lively	B-Language
Kernel	I-Language
,	O
e.g.	O
,	O
by	O
allowing	O
the	O
user	O
interface	O
and	O
application	O
source	O
code	O
to	O
be	O
edited	O
on	O
the	O
fly	O
.	O
</s>
<s>
However	O
,	O
in	O
Lively	O
for	O
Qt	B-Language
the	O
development	O
work	O
is	O
performed	O
using	O
the	O
familiar	O
,	O
well-documented	O
APIs	O
of	O
the	O
Qt	B-Language
platform	O
.	O
</s>
