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. |
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