PropertyHandle :: IsEmpty - Is property instance empty?
The function returns whether the property handle is empty (YES) or not (NO). A property is considered as empty when it is a collection with no instances or (if it is not a collection) when:
- the value is false (LOGICAL)
- the value is 0 (INT, REAL, Enumeration, DATE, TIME, DATETIME)
- the value is 0, ' ' or 'N' (CHAR, STRING,CHAR,MEMO)
- when all values for a structured instance are empty
Return value: Return value ( logical )
The function returns YES when the question was answered positively. Otherwise it returns NO.