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Understanding Data Types and Field Properties
Designing Processes
Using and Displaying Data
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Designing Process Objects
Designing Service Connectors
Using App Connections
System Services, Listeners and Connectors
Designing Human Tasks

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empty

The empty function in XQuery is used to determine whether a sequence is empty. It is useful in various conditional checks and scenarios where determining the presence of data is necessary.

Syntax

fn:empty(arg)

The following table describes the argument for this command:

Argument	Required/ Optional	Description
arg	Required	This is the sequence that you want to test for emptiness. It can contain zero or more items.

Return Value

If the value of

$arg

is the empty sequence, the function returns

true

. Otherwise, the function returns

false

Examples

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
fn:empty( ('a', 'b', 'c') )	false
fn:empty( () )	true
fn:empty(0)	false
fn:empty((1, 2, 3))	false
fn:empty(("apple", "orange"))	false

Atomic Values of All Types functions

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Table of Contents

Design

Design

empty

empty

Syntax

Return Value

Examples