<s>
XFA	B-Language
(	O
also	O
known	O
as	O
XFA	B-Language
forms	I-Language
)	O
stands	O
for	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
,	O
a	O
family	O
of	O
proprietary	O
XML	B-Protocol
specifications	I-Protocol
that	O
was	O
suggested	O
and	O
developed	O
by	O
JetForm	B-Application
to	O
enhance	O
the	O
processing	O
of	O
web	B-General_Concept
forms	I-General_Concept
.	O
</s>
<s>
It	O
can	O
be	O
also	O
used	O
in	O
PDF	B-Application
files	I-Application
starting	O
with	O
the	O
PDF	B-Application
1.5	O
specification	O
.	O
</s>
<s>
The	O
XFA	B-Language
specification	O
is	O
referenced	O
as	O
an	O
external	O
specification	O
necessary	O
for	O
full	O
application	O
of	O
the	O
ISO	B-Application
32000-1	I-Application
specification	O
(	O
PDF	B-Application
1.7	O
)	O
.	O
</s>
<s>
The	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
was	O
not	O
standardized	O
as	O
an	O
ISO	O
standard	O
,	O
and	O
has	O
been	O
deprecated	O
in	O
PDF	B-Application
2.0	O
.	O
</s>
<s>
XFA	B-Language
's	O
main	O
extension	O
to	O
XML	B-Protocol
are	O
computationally	O
active	O
tags	O
.	O
</s>
<s>
In	O
addition	O
,	O
all	O
instances	O
created	O
from	O
a	O
given	O
XFA	B-Language
form	O
template	O
keep	O
the	O
specification	O
of	O
data	O
capture	O
,	O
rendering	O
,	O
and	O
manipulation	O
rules	O
from	O
the	O
original	O
.	O
</s>
<s>
Another	O
major	O
advantage	O
of	O
XFA	B-Language
is	O
that	O
its	O
data	O
format	O
allows	O
compatibility	O
with	O
other	O
systems	O
,	O
and	O
with	O
changes	O
to	O
other	O
technology	O
,	O
applications	O
and	O
technology	O
standards	O
.	O
</s>
<s>
According	O
to	O
JetForm	B-Application
's	O
submission	O
to	O
the	O
World	O
Wide	O
Web	O
Consortium	O
,	O
"	O
XFA	B-Language
addresses	O
the	O
needs	O
of	O
organizations	O
to	O
securely	O
capture	O
,	O
present	O
,	O
move	O
,	O
process	O
,	O
output	O
and	O
print	O
information	O
associated	O
with	O
electronic	O
forms.	O
"	O
</s>
<s>
The	O
XFA	B-Language
proposal	O
was	O
submitted	O
to	O
the	O
W3C	O
in	O
May	O
1999	O
.	O
</s>
<s>
In	O
2002	O
,	O
the	O
JetForm	B-Application
Corporation	O
was	O
acquired	O
by	O
Adobe	O
Systems	O
,	O
and	O
the	O
latter	O
introduced	O
XFA	B-Language
forms	I-Language
with	O
PDF	B-Application
1.5	O
and	O
the	O
subsequent	O
Acrobat	B-Application
releases	O
(	O
6	O
and	O
7	O
)	O
in	O
2003	O
.	O
</s>
<s>
XFA	B-Language
forms	I-Language
are	O
saved	O
internally	O
in	O
PDF	B-Application
files	I-Application
or	O
as	O
XDP	B-Application
(	O
XML	B-Application
Data	I-Application
Package	I-Application
)	O
files	O
which	O
can	O
be	O
opened	O
in	O
Adobe	O
's	O
LiveCycle	B-Application
Designer	O
software	O
.	O
</s>
<s>
An	O
XDP	B-Application
can	O
package	O
a	O
PDF	B-Application
file	I-Application
,	O
along	O
with	O
XML	B-Protocol
form	O
and	O
template	O
data	O
.	O
</s>
<s>
XDP	B-Application
provides	O
a	O
mechanism	O
for	O
packaging	O
form	O
components	O
within	O
a	O
surrounding	O
XML	B-Protocol
container	O
.	O
</s>
<s>
Although	O
XFA	B-Language
can	O
make	O
use	O
of	O
PDF	B-Application
,	O
XFA	B-Language
is	O
not	O
tied	O
to	O
a	O
particular	O
page	O
description	O
language	O
.	O
</s>
<s>
The	O
XFA	B-Language
specification	O
includes	O
an	O
appendix	O
that	O
discusses	O
details	O
of	O
the	O
Adobe-specific	O
XFA	B-Language
implementation	O
and	O
behaviors	O
of	O
Adobe	O
products	O
that	O
deviate	O
from	O
the	O
XFA	B-Language
specification	O
.	O
</s>
<s>
Data	O
filled	O
in	O
an	O
XFA	B-Language
form	O
may	O
be	O
submitted	O
to	O
a	O
host	O
using	O
an	O
HTTP	O
POST	O
operation	O
in	O
XDP	B-Application
format	O
,	O
PDF	B-Application
format	I-Application
,	O
XFDF	O
format	O
,	O
XML	B-Protocol
1.0	O
format	O
or	O
as	O
an	O
URL-encoded	O
format	O
.	O
</s>
<s>
XFA	B-Language
supports	O
the	O
use	O
of	O
XSLT	O
to	O
transform	O
the	O
XML	B-Protocol
data	O
before	O
it	O
is	O
loaded	O
to	O
XFA	B-Language
Data	O
DOM	B-General_Concept
or	O
after	O
it	O
is	O
unloaded	O
from	O
XFA	B-Language
Data	O
DOM	B-General_Concept
.	O
</s>
<s>
One	O
of	O
XFA	B-Language
approaches	O
to	O
pagination	O
duplicates	O
the	O
pagination	O
logic	O
and	O
much	O
of	O
the	O
syntax	O
of	O
XSL-FO	B-Language
.	O
</s>
<s>
XFA	B-Language
forms	I-Language
are	O
synonymous	O
with	O
SmartForms	O
in	O
the	O
Australian	O
government	O
.	O
</s>
<s>
XFA	B-Language
defines	O
static	O
forms	O
(	O
since	O
XFA	B-Language
2.0	O
and	O
before	O
)	O
and	O
dynamic	O
forms	O
(	O
since	O
XFA	B-Language
2.1	O
or	O
2.2	O
)	O
.	O
</s>
<s>
XFA	B-Language
recognises	O
two	O
types	O
of	O
static	O
forms	O
:	O
"	O
old-style	O
static	O
forms	O
"	O
(	O
using	O
"	O
full	O
XFA	B-Language
"	O
)	O
and	O
XFAF	O
(	O
a	O
subset	O
of	O
full	O
XFA	B-Language
,	O
defined	O
since	O
XFA	B-Language
2.5	O
)	O
.	O
</s>
<s>
Dynamic	O
forms	O
(	O
defined	O
since	O
XFA	B-Language
2.1	O
or	O
2.2	O
)	O
can	O
change	O
in	O
appearance	O
in	O
several	O
ways	O
in	O
response	O
to	O
changes	O
in	O
the	O
data	O
.	O
</s>
<s>
Dynamic	O
form	O
cannot	O
rely	O
on	O
a	O
PDF	B-Application
representation	O
of	O
its	O
boilerplate	O
,	O
because	O
the	O
positioning	O
and	O
layout	O
of	O
the	O
boilerplate	O
change	O
as	O
the	O
fields	O
grow	O
and	O
shrink	O
or	O
as	O
subforms	O
are	O
omitted	O
and	O
included	O
.	O
</s>
<s>
PDF	B-Application
1.7	O
supports	O
two	O
different	O
methods	O
for	O
integrating	O
data	O
and	O
PDF	B-Application
forms	O
.	O
</s>
<s>
AcroForms	O
(	O
also	O
known	O
as	O
Acrobat	B-Application
forms	I-Application
)	O
,	O
introduced	O
and	O
included	O
in	O
the	O
PDF	B-Application
1.2	O
format	O
specification	O
.	O
</s>
<s>
Adobe	B-Language
XML	I-Language
Forms	I-Language
Architecture	I-Language
(	O
XFA	B-Language
)	O
forms	O
,	O
introduced	O
in	O
the	O
PDF	B-Application
1.5	O
format	O
specification	O
as	O
an	O
optional	O
feature	O
(	O
The	O
XFA	B-Language
specification	O
is	O
not	O
included	O
in	O
the	O
PDF	B-Application
specification	O
,	O
it	O
is	O
only	O
referenced	O
.	O
)	O
</s>
<s>
Adobe	O
XFA	B-Language
Forms	I-Language
are	O
not	O
compatible	O
with	O
AcroForms	O
.	O
</s>
<s>
When	O
an	O
XFA	B-Language
is	O
packaged	O
inside	O
a	O
PDF	B-Application
file	I-Application
,	O
it	O
is	O
placed	O
in	O
the	O
AcroForm	O
document	O
resources	O
dictionary	O
(	O
"	O
Shell	O
PDF	B-Application
"	O
)	O
or	O
referenced	O
from	O
the	O
AcroForm	O
entry	O
in	O
the	O
document	O
catalog	O
.	O
</s>
<s>
Creating	O
XFA	B-Language
Forms	I-Language
for	O
use	O
in	O
Adobe	B-Application
Reader	I-Application
requires	O
Adobe	B-Protocol
LiveCycle	I-Protocol
Designer	I-Protocol
.	O
</s>
<s>
Adobe	B-Application
Reader	I-Application
contains	O
"	O
disabled	O
features	O
"	O
for	O
use	O
of	O
XFA	B-Language
Forms	I-Language
,	O
that	O
will	O
activate	O
only	O
when	O
opening	O
a	O
PDF	B-Application
document	O
that	O
was	O
created	O
using	O
enabling	O
technology	O
available	O
only	O
from	O
Adobe	O
.	O
</s>
<s>
The	O
XFA	B-Language
Forms	I-Language
are	O
not	O
compatible	O
with	O
Adobe	B-Application
Reader	I-Application
prior	O
to	O
version	O
6	O
.	O
</s>
<s>
Starting	O
with	O
XFA	B-Language
2.5	O
forms	O
can	O
use	O
a	O
subset	O
of	O
the	O
full	O
XFA	B-Language
capability	O
.	O
</s>
<s>
XFA	B-Language
can	O
be	O
used	O
as	O
:	O
</s>
<s>
full	O
XFA	B-Language
-	O
which	O
express	O
all	O
of	O
the	O
form	O
,	O
including	O
boilerplate	O
,	O
directly	O
in	O
XFA	B-Language
(	O
without	O
any	O
PDF	B-Application
or	O
without	O
a	O
complete	O
PDF	B-Application
background	O
)	O
.	O
</s>
<s>
It	O
can	O
be	O
packaged	O
inside	O
a	O
"	O
shell	O
PDF	B-Application
"	O
with	O
minimal	O
PDF	B-Application
markup	O
or	O
as	O
a	O
standalone	O
XDP	B-Application
.	O
</s>
<s>
It	O
is	O
used	O
for	O
dynamic	O
XFA	B-Language
forms	I-Language
(	O
since	O
XFA	B-Language
2.1	O
)	O
and	O
also	O
for	O
so	O
called	O
"	O
traditional	O
"	O
(	O
old-style	O
)	O
static	O
XFA	B-Language
forms	I-Language
.	O
</s>
<s>
Optionally	O
it	O
may	O
include	O
a	O
pre-rendered	O
depiction	O
of	O
the	O
XFA	B-Language
form	O
as	O
PDF	B-Application
pages	O
-	O
but	O
it	O
is	O
useful	O
only	O
for	O
traditional	O
static	O
forms	O
.	O
</s>
<s>
Dynamic	O
XFA	B-Language
must	O
be	O
rendered	O
on	O
file	O
opening	O
.	O
</s>
<s>
XFAF	O
(	O
XFA	B-Language
Foreground	O
)	O
subset	O
-	O
(	O
introduced	O
in	O
XFA	B-Language
2.5	O
)	O
-	O
a	O
form	O
in	O
which	O
each	O
page	O
of	O
the	O
XFA	B-Language
form	O
overlays	O
a	O
PDF	B-Application
background	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
only	O
for	O
static	O
XFA	B-Language
forms	I-Language
.	O
</s>
<s>
This	O
architecture	O
uses	O
only	O
a	O
subset	O
of	O
XFA	B-Language
.	O
</s>
<s>
It	O
can	O
be	O
packaged	O
inside	O
a	O
regular	O
PDF	B-Application
document	O
or	O
as	O
a	O
standalone	O
XDP	B-Application
file	O
with	O
embedded	O
PDF	B-Application
.	O
</s>
<s>
In	O
XFAF	O
each	O
XFA	B-Language
field	O
corresponds	O
to	O
a	O
PDF	B-Application
interactive	O
field	O
(	O
AcroForm	O
field	O
)	O
.	O
</s>
<s>
XFA	B-Language
forms	I-Language
can	O
be	O
created	O
and	O
used	O
as	O
PDF	B-Application
1.5	O
-	O
1.7	O
files	O
or	O
as	O
XDP	B-Application
(	O
XML	B-Application
Data	I-Application
Package	I-Application
)	O
.	O
</s>
<s>
The	O
format	O
of	O
an	O
XFA	B-Language
resource	O
in	O
PDF	B-Application
is	O
described	O
by	O
the	O
XML	B-Application
Data	I-Application
Package	I-Application
Specification	O
.	O
</s>
<s>
PDF	B-Application
may	O
contain	O
XFA	B-Language
in	O
XDP	B-Application
format	O
,	O
but	O
XFA	B-Language
may	O
also	O
contain	O
PDF	B-Application
.	O
</s>
<s>
When	O
the	O
XFA	B-Language
(	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
)	O
grammars	O
used	O
for	O
an	O
XFA	B-Language
form	O
are	O
moved	O
from	O
one	O
application	O
to	O
another	O
,	O
they	O
must	O
be	O
packaged	O
as	O
an	O
XML	B-Application
Data	I-Application
Package	I-Application
.	O
</s>
<s>
The	O
XDP	B-Application
may	O
be	O
a	O
standalone	O
document	O
or	O
it	O
may	O
in	O
turn	O
be	O
carried	O
inside	O
a	O
PDF	B-Application
document	O
.	O
</s>
<s>
XFA	B-Language
Form	O
packaging	O
variants	O
(	O
using	O
XDP	B-Application
)	O
:	O
</s>
<s>
inside	O
a	O
regular	O
PDF	B-Application
Document	O
-	O
used	O
for	O
static	O
forms	O
-	O
XFAF	O
.	O
</s>
<s>
inside	O
a	O
"	O
Shell	O
PDF	B-Application
"	O
-	O
used	O
for	O
the	O
"	O
full	O
XFA	B-Language
"	O
form	O
(	O
dynamic	O
or	O
traditional	O
static	O
)	O
-	O
A	O
Shell	O
PDF	B-Application
file	I-Application
contains	O
only	O
a	O
minimal	O
skeleton	O
of	O
PDF	B-Application
markup	O
plus	O
the	O
complete	O
XFA	B-Language
content	O
,	O
any	O
fonts	O
and	O
images	O
needed	O
for	O
rendering	O
of	O
the	O
form	O
.	O
</s>
<s>
Packaging	O
an	O
XDP	B-Application
within	O
PDF	B-Application
has	O
the	O
advantage	O
that	O
it	O
is	O
more	O
compact	O
,	O
because	O
PDF	B-Application
is	O
compressed	O
.	O
</s>
<s>
XDP	B-Application
in	O
PDF	B-Application
can	O
be	O
digitally	O
signed	O
in	O
ways	O
that	O
a	O
standalone	O
XDP	B-Application
cannot	O
.	O
</s>
<s>
In	O
contrast	O
,	O
packaging	O
form	O
components	O
within	O
an	O
XML	B-Protocol
container	O
(	O
XDP	B-Application
)	O
makes	O
it	O
easy	O
for	O
standard	O
XML	B-Protocol
applications	O
to	O
work	O
with	O
XFA	B-Language
forms	I-Language
.	O
</s>
<s>
The	O
XML	B-Protocol
components	O
are	O
human	O
readable	O
and	O
easy	O
editable	O
(	O
in	O
contrast	O
with	O
PDF	B-Application
source	O
code	O
)	O
.	O
</s>
<s>
When	O
in	O
XDP	B-Application
form	O
,	O
an	O
XFA	B-Language
document	O
may	O
be	O
validated	O
using	O
schemas	O
attached	O
to	O
XFA	B-Language
specification	O
.	O
</s>
<s>
Most	O
PDF	B-Application
processors	O
do	O
not	O
handle	O
XFA	B-Language
content	O
.	O
</s>
<s>
When	O
generating	O
a	O
shell	O
PDF	B-Application
it	O
is	O
recommended	O
to	O
include	O
in	O
the	O
PDF	B-Application
markup	O
a	O
simple	O
one-page	O
PDF	B-Application
image	O
displaying	O
a	O
warning	O
message	O
(	O
e.g.	O
</s>
<s>
"	O
To	O
view	O
the	O
full	O
contents	O
of	O
this	O
document	O
,	O
you	O
need	O
a	O
later	O
version	O
of	O
the	O
PDF	B-Application
viewer	O
.	O
</s>
<s>
"	O
,	O
"	O
The	O
full	O
content	O
of	O
this	O
file	O
cannot	O
be	O
displayed	O
with	O
your	O
current	O
PDF	B-Application
viewer	O
.	O
</s>
<s>
If	O
this	O
message	O
is	O
not	O
eventually	O
replaced	O
by	O
the	O
proper	O
contents	O
of	O
the	O
document	O
,	O
your	O
PDF	B-Application
viewer	O
may	O
not	O
be	O
able	O
to	O
display	O
this	O
type	O
of	O
document	O
.	O
</s>
<s>
PDF	B-Application
processors	O
that	O
can	O
render	O
XFA	B-Language
content	O
should	O
either	O
not	O
display	O
the	O
supplied	O
warning	O
page	O
image	O
or	O
replace	O
it	O
quickly	O
with	O
the	O
dynamic	O
form	O
content	O
.	O
</s>
<s>
In	O
2013	O
,	O
as	O
a	O
solution	O
for	O
mobile	O
platforms	O
and	O
desktop	O
platforms	O
without	O
XFA	B-Language
support	O
,	O
Adobe	O
created	O
software	O
that	O
creates	O
online	O
HTML5	O
fillable	O
forms	O
from	O
XFA	B-Language
(	O
known	O
as	O
Adobe	O
"	O
Mobile	O
Forms	O
"	O
)	O
.	O
</s>
<s>
Mobile	O
Forms	O
are	O
not	O
a	O
single	O
file	O
like	O
a	O
PDF	B-Application
or	O
XDP	B-Application
.	O
</s>
<s>
Rich	O
text	O
may	O
appear	O
in	O
data	O
supplied	O
to	O
the	O
XFA	B-Language
forms	I-Language
,	O
in	O
XFA	B-Language
templates	O
as	O
default	O
text	O
values	O
,	O
as	O
field	O
captions	O
,	O
or	O
as	O
boilerplate	O
(	O
draw	O
)	O
content	O
.	O
</s>
<s>
Starting	O
with	O
PDF	B-Application
1.5	O
(	O
XFA	B-Language
2.02	O
)	O
,	O
the	O
text	O
contents	O
of	O
variable	O
text	O
form	O
fields	O
,	O
as	O
well	O
as	O
markup	O
annotations	O
,	O
may	O
include	O
formatting	O
information	O
(	O
style	O
information	O
)	O
.	O
</s>
<s>
These	O
rich	O
text	O
strings	O
are	O
XML	B-Protocol
documents	I-Protocol
that	O
conform	O
to	O
the	O
rich	O
text	O
conventions	O
specified	O
for	O
the	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
specification	O
,	O
which	O
is	O
itself	O
a	O
subset	O
of	O
the	O
XHTML	B-Language
1.0	I-Language
specification	O
,	O
augmented	O
with	O
a	O
restricted	O
set	O
of	O
CSS2	B-Language
style	O
attributes	O
.	O
</s>
<s>
In	O
PDF	B-Application
1.6	O
,	O
PDF	B-Application
supports	O
the	O
rich	O
text	O
elements	O
and	O
attributes	O
specified	O
in	O
the	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
(	O
XFA	B-Language
)	O
Specification	O
,	O
2.2	O
.	O
</s>
<s>
In	O
PDF	B-Application
1.7	O
,	O
PDF	B-Application
supports	O
the	O
rich	O
text	O
elements	O
and	O
attributes	O
specified	O
in	O
the	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
(	O
XFA	B-Language
)	O
Specification	O
,	O
2.4	O
.	O
</s>
<s>
It	O
was	O
announced	O
in	O
2011	O
that	O
PDF	B-Application
2.0	O
(	O
ISO	B-Application
32000	I-Application
Part	O
2	O
)	O
would	O
reference	O
XFA	B-Language
3.1	O
,	O
but	O
when	O
published	O
,	O
PDF	B-Application
2.0	O
deprecated	O
it	O
.	O
</s>
<s>
When	O
an	O
XFA	B-Language
form	O
is	O
converted	O
to	O
PDF/A	B-General_Concept
,	O
both	O
the	O
boilerplate	O
and	O
field	O
content	O
are	O
flattened	O
into	O
a	O
PDF	B-Application
appearance	O
stream	O
.	O
</s>
<s>
PDF/A	B-General_Concept
forbids	O
active	O
content	O
and	O
all	O
XFA	B-Language
content	O
except	O
,	O
optionally	O
,	O
the	O
XML	B-Protocol
Data	O
Document	O
(	O
forms	O
data	O
created	O
by	O
a	O
user	O
)	O
.	O
</s>
<s>
The	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
specification	O
is	O
not	O
included	O
in	O
the	O
PDF	B-Application
1.7	O
standard	O
(	O
ISO	O
32000-1:2008	O
)	O
and	O
it	O
is	O
only	O
referenced	O
as	O
an	O
external	O
proprietary	O
specification	O
created	O
and	O
published	O
by	O
Adobe	O
.	O
</s>
<s>
However	O
,	O
the	O
ISO	B-Application
32000-1	I-Application
references	O
XFA	B-Language
as	O
normative	O
and	O
indispensable	O
for	O
the	O
application	O
of	O
the	O
ISO	B-Application
32000-1	I-Application
specification	O
.	O
</s>
<s>
XFA	B-Language
was	O
not	O
standardized	O
as	O
an	O
ISO	O
standard	O
.	O
</s>
<s>
Since	O
2007	O
,	O
development	O
of	O
PDF	B-Application
standard	O
has	O
been	O
conducted	O
by	O
ISO	O
's	O
Technical	O
Committee	O
171/Subcommittee	O
2/Working	O
Group	O
8	O
(	O
TC	O
171/SC	O
2/WG	O
8	O
)	O
.	O
</s>
<s>
In	O
2011	O
the	O
ISO	O
Committee	O
urged	O
Adobe	O
Systems	O
to	O
submit	O
the	O
XFA	B-Language
Specification	O
,	O
XML	B-Language
Forms	I-Language
Architecture	I-Language
(	O
XFA	B-Language
)	O
,	O
to	O
ISO	O
for	O
standardization	O
,	O
and	O
requested	O
that	O
Adobe	O
Systems	O
stabilize	O
the	O
XFA	B-Language
specification	O
.	O
</s>
<s>
The	O
Committee	O
expressed	O
its	O
concerns	O
about	O
the	O
stability	O
of	O
the	O
XFA	B-Language
specification	O
.	O
</s>
<s>
In	O
2017	O
the	O
ISO	O
Committee	O
deprecated	O
XFA	B-Language
from	O
PDF	B-Application
2.0	O
.	O
</s>
