Returns true for an element that is
fn:nilled( xs:boolean?fn:nilled( $arg as node()?xs:boolean?If the argument is omitted, it defaults to the context item (.). The
behavior of the function if the argument is omitted is exactly the same as if the
context item had been passed as the argument.
If $arg is the empty sequence, the function returns the empty sequence.
Otherwise the function returns the result of the dm:nilled accessor as
defined in (see ).
The following errors may be raised when $arg is omitted:
If the context item is absent, dynamic error
If the context item is not a node, type error .
If $arg is not an element node, the function returns the empty
sequence.
If $arg is an untyped element node, the function returns false.
In practice, the function returns true only for an element node that has
the attribute xsi:nil="true" and that is successfully validated against a
schema that defines the element to be nillable; the detailed rules, however, are defined
in .
