The required Property
Release 2.0 - ...
Describes whether a value is required before the instance data is submitted.
| Computed Expression | Yes |
| Legal Values | Any expression that is convertible to XPath booelan with boolean(). |
| Default Value | false() |
| Inheritance Rules | does not inherit. |
A form may require certain values, and this requirement may be dynamic. When evaluating to true, this model item property indicates that a non-empty instance data node is required before a submission of instance data can occur.
Example
| XML |
Copy Code
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<xforms:bind nodeset="/person-name/first-name" required="true()"/> |
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Specification
Link to the XForms specification: the required Property.