# IsNull

Returns true if the argument has a null value.

The behavior of this function is dependent on the representation.

In XML, returns true if the value of the Input Value argument is an element with the xsi:nil attribute that indicates a null value.

For Database, returns true if the value of the Input Value argument is a null value.

For other representations false is always returned as they don't support the notion of null values.

## Arguments

| Input Value (Simple) | Specify the value to check. |
| --- | --- |