fn:empty - XPath XQuery Reference

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XPath/XQuery empty function

Returns true if the argument is the empty sequence.

fn:empty(

$arg as item()*

) as xs:boolean

This function is deterministic, context-independent, and focus-independent.

If the value of $arg is the empty sequence, the function returns true; otherwise, the function returns false.

The expression fn:empty((1,2,3)[10]) returns true().

The expression fn:empty(fn:remove(("hello", "world"), 1)) returns false().

The expression fn:empty([]) returns false().

The expression fn:empty(map{}) returns false().

The expression fn:empty("") returns false().

Assuming $in is an element with no children:

let $break := <br/> return fn:empty($break)

The result is false().

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