IsUnknown
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We advise to use the HasValue() and IsEmpty() functions as they are more practical and logical in use.
If the input parameter is a list or a collection (like a Concept-Set), then the IsUnknown()
function checks if the list has no rows.
The
IsKnown()
function checks the opposite of this function.
Returns true
if parameter
is unknown.
Returns false
if parameter
is not unknown.
parameter
any
Field that is checked for a value