fn:exists - XPath XQuery Reference

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XPath/XQuery exists function

Returns true if the argument is a non-empty sequence.

fn:exists(

$arg as item()*

) as xs:boolean

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

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

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

The expression fn:exists(fn:remove(("hello", "world"), 1)) returns true().

The expression fn:exists([]) returns true().

The expression fn:exists(map{}) returns true().

The expression fn:exists("") returns true().

Assuming $in is an element with no children:

let $break :=
return fn:exists($break)

The result is true().

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