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nilled

The nilled function in XQuery is used to check whether a given node is nilled. A nilled element is where the

xsi:nil

attribute is set to

true

in an XML document that supports XML Schema.

fn:nilled(arg)

The following table describes the argument for this command:

Argument	Required/ Optional	Description
arg	Required	The node to be checked for the nilled status. This can be an element node or none.

Returns an

xs:boolean

indicating whether the argument node is nilled.

Returns

true

if the node is an element and is nilled, that is,

xsi:nil="true"

Returns

false

if the node is an element but not nilled.

Returns

None

if $arg is not an element node or if it is empty.

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
fn:nilled(())	None
let $textNode := text{"example"} return fn:nilled($textNode)	None

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