Function Name	Is Null
Category	Type
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Description	If the input Node is null (an empty sequence) then the Result is true, if it contains a sequence of one or more values then the Result is false.
Inputs	Node The input value to check (0-n items, values or nodes).
Outputs	Result True if the input Node is an empty sequence. False if the input Node is a sequence or one or more items.

Usage

Determines if an input contains an empty sequence (i.e. database value that is null).