<s>
MXML	B-Operating_System
is	O
an	O
XML-based	O
user	B-Language
interface	I-Language
markup	I-Language
language	I-Language
first	O
introduced	O
by	O
Macromedia	O
in	O
March	O
2004	O
.	O
</s>
<s>
Application	O
developers	O
use	O
MXML	B-Operating_System
in	O
combination	O
with	O
ActionScript	B-Operating_System
to	O
develop	O
rich	B-Application
web	I-Application
applications	I-Application
,	O
with	O
products	O
such	O
as	O
Apache	B-Operating_System
Flex	I-Operating_System
.	O
</s>
<s>
Adobe	O
Systems	O
,	O
which	O
acquired	O
Macromedia	O
in	O
December	O
2005	O
,	O
gives	O
no	O
official	O
meaning	O
for	O
the	O
acronym	O
MXML	B-Operating_System
.	O
</s>
<s>
Some	O
developers	O
suggest	O
it	O
should	O
stand	O
for	O
"	O
Magic	O
eXtensible	B-Protocol
Markup	I-Protocol
Language	I-Protocol
"	O
(	O
which	O
is	O
a	O
backronym	O
)	O
.	O
</s>
<s>
It	O
is	O
likely	O
that	O
the	O
name	O
comes	O
from	O
the	O
MX	O
suffix	O
given	O
to	O
Macromedia	O
Studio	O
products	O
released	O
in	O
2002	O
and	O
2004	O
,	O
or	O
simply	O
"	O
Macromedia	O
eXtensible	B-Protocol
Markup	I-Protocol
Language	I-Protocol
"	O
.	O
</s>
<s>
MXML	B-Operating_System
is	O
used	O
mainly	O
to	O
declaratively	O
lay	O
out	O
the	O
interface	O
of	O
applications	O
and	O
can	O
also	O
be	O
used	O
to	O
implement	O
business	O
logic	O
and	O
internet	B-Application
application	I-Application
behaviors	O
.	O
</s>
<s>
It	O
can	O
contain	O
chunks	O
of	O
ActionScript	B-Operating_System
code	O
,	O
either	O
when	O
creating	O
the	O
body	O
of	O
an	O
event	O
handler	O
function	O
,	O
or	O
with	O
data	O
binding	O
where	O
the	O
curly	O
braces	O
( {	O
)	O
syntax	O
is	O
used	O
.	O
</s>
<s>
MXML	B-Operating_System
is	O
often	O
used	O
with	O
Flex	B-Operating_System
Server	I-Operating_System
,	O
which	O
dynamically	O
compiles	O
it	O
into	O
standard	O
binary	O
SWF	O
files	O
.	O
</s>
<s>
However	O
,	O
the	O
Adobe	B-Application
Flash	I-Application
Builder	I-Application
IDE	O
(	O
formerly	O
Adobe	B-Application
Flex	I-Application
Builder	I-Application
)	O
and	O
free	O
Flex	O
SDK	O
can	O
also	O
compile	O
MXML	B-Operating_System
into	O
SWF	O
files	O
without	O
the	O
use	O
of	O
a	O
Flex	B-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
There	O
is	O
also	O
a	O
PHP	B-Application
PEAR	B-Application
package	O
called	O
,	O
which	O
is	O
a	O
framework	O
to	O
build	O
Adobe	B-Operating_System
Flex	I-Operating_System
applications	O
.	O
</s>
<s>
MXML	B-Operating_System
is	O
considered	O
a	O
proprietary	O
standard	O
due	O
to	O
its	O
tight	O
integration	O
with	O
Adobe	O
technologies	O
.	O
</s>
<s>
It	O
is	O
like	O
XAML	B-Device
in	O
this	O
respect	O
.	O
</s>
<s>
No	O
published	O
translators	O
exist	O
for	O
converting	O
an	O
MXML	B-Operating_System
document	O
to	O
another	O
user	O
interface	O
language	O
such	O
as	O
UIML	O
,	O
XUL	B-Application
,	O
XForms	B-Application
,	O
XAML	B-Device
,	O
or	O
SVG	B-Application
.	O
</s>
<s>
However	O
,	O
there	O
do	O
exist	O
third	O
party	O
vendor	O
plugins	O
for	O
Flex	B-Application
Builder	I-Application
that	O
are	O
capable	O
of	O
generating	O
a	O
result	O
other	O
than	O
a	O
SWF	O
file	O
from	O
Flex	O
applications	O
,	O
for	O
instance	O
native	O
mobile	O
applications	O
.	O
</s>
