IsKnown

The IsKnown() function checks whether the input parameter is known and recognizable as a value or element.

It is only slightly different from HasValue() in the way that an empty text-value is a known element (it is a text), but it does not have a value.

This function is SQL compatible. For more information about SQL compatibility, see our documentation.

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 IsKnown() function checks if the list has at least 1 row.

The IsUnknown() function checks the opposite of this function.

Returns true if parameter is not unknown. Returns false if parameter is unknown.

Syntax

IsKnown(parameter)

IsKnown( "1" ) => True

IsKnown(unknownnumber) => False

IsKnown( "" ) => True >> This is different from HasValue( "" ) : "" is a known element (an empty string) but it does not have a value according to the HasValue implementation.

IsKnown( " " ) => True

IsKnown( '' ) => True

IsKnown( {} ) => False

IsKnown( [List WithRows] ) => True

IsKnown( [List WithNoRows] ) => False

IsKnown(ToString(unknownstring)) => TRUE > the ToString on UnknownString makes the element Known as a String Type but with an Empty Value >> better use the HasValue or IsEmpty functions for more practical and logical use

Parameters

Name	Type	Required	Description
parameter	any	☑️	Field that is checked for a value