XFA Specification
Chapter C,
Modified XFA Template Features
977
Security and Control
XML digital signatures, version 2.2
XFA now supports XML digital signatures, using the mechanism described by W3C for an XML Digital
Signature
[XMLDSIG-CORE].
This support includes new event properties that describe actions for creating,
clearing, and validating signatures. It also includes metadata additions to the Signature object described
[XMLDSIG-CORE].
These additions are used in signature validation.
See “Signed Forms” on page 403.
Uniquely identifying templates, version 2.2
XDP and PDF specify properties for uniquely identifying a template and for time-stamping the template
whenever it is changed. In addition, XFA designing applications and XFA processing applications are
required to retain/propogate the the template identifier and to update the time stamp when applicable.
Modified XFA Template Features
See “Validation checks against validation-specific picture clauses, version 2.1” on page 968.
See “Immediate commitment of selections, version 2.1” on page 973.
See “Default data binding to include attribute data, version 2.1” on page 971.
Deprecated XFA Template Features
Template Syntax
Refactored break element, version 2.4
The syntax of the
break
element was confusing, largely because it was overloaded with too many
functions. It has been replaced with a set of simpler single-purpose elements. The
break
element is still
legal in XFA 2.4 but is deprecated and slated for removal in a future version.
Deprecated hAlign and vAlign attributes on container elements, version 2.4
The
hAlign
and
vAlign
attributes on container elements (
subform
,
field
,
draw
and
exclGroup
) are
redundant. The same-named attributes on the
para
element, which is a property of each of the container
elements, should be used instead. The redundant attributes on the container elements are deprecated in
XFA 2.4 and slated for removal in a future version.
Note:
These attributes were never implemented in Acrobat.
Deprecated stateless attribute on the script element, version 2.4
The
stateless
attribute on the
script
element is not practical. It intrudes too deeply into the
architecture of the scripting languages. This attribute is deprecated in XFA 2.4 and slated for removal in a
future version.
Note:
This attribute was never implemented in Acrobat.