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Compatibility
[SINCE Orbeon Forms 2016.2]
As an extension to XPath 2.0, Orbeon Forms supports "let expressions" in XPath. XPath 2.0 doesn't support such expressions, while XQuery 1.0 and XPath 3.0 and 3.1 do. Example:
let $a := 'Lorem ipsum dolor',
$b := 'sit amet',
$c := string-join(($a, $b), ' ')
return
concat($c, ', consectetur adipiscing elit.')
The use of the XForms 1.1
if() function clashes with XPath 2.0's built-in if (...) then ... else ... construct.The bottom line is that you cannot directly use the XForms
if() function in Orbeon Forms. The following, for example, will not work in Orbeon Forms:if (normalize-space(/first-name) = '', '', concat('Hello, ', /first-name, '!'))
The good news is that you have ways around this issue:
Use the XPath 2.0
if (...) then ... else ... construct instead:if (normalize-space(/first-name) = '') then '' else concat('Hello, ', /first-name, '!')
Use the Orbeon Forms
xf:if() extension, which behaves like the XForms if() function (not recommended):xf:if (normalize-space(/first-name) = '', '', concat('Hello, ', /first-name, '!'))
The XForms 1.1
seconds-from-dateTime() function clashes with the XPath 2.0 function of the same name:- they take a parameter of different types
- the XForms 1.1 function takes an
xs:string - the XPath 2 function takes an
xs:dateTime
- they do not have the same semantic
- the XForms 1.1 function returns "the number of seconds difference between the specified dateTime (normalized to UTC) and 1970-01-01T00:00:00Z"
- the XPath 2 function returns "an
xs:decimalvalue greater than or equal to zero and less than 60, representing the seconds and fractional seconds in the localized value of$arg"
- The XForms version of the function is available as
xf:seconds-from-dateTime(). - The XPath 2.0 version of the function is available without a namespace as
seconds-from-dateTime().
Last modified 4yr ago