Deprecated functions
xxf:event()
xxf:event(
    $attribute-name as xs:string
) as item()*
xxf:event() works like the XForms 1.1 event() function, except that when using XBL components, xxf:event() returns event information from the original event instead of the retargeted event.
This function is deprecated since Orbeon Forms 4 and is just an alias for the standard event() function.
xf:if() / xxf:if()
xf:if()
xxf:if()
This function implements the semantic of the XForms 1.0 if() function.
Prefer the XPath 2 if(...) then ... else ... construct.