missing value

• constant
• a special value indicating that there is no value, used particularly in records retrieved from a database
• Note: Most operations in SenseTalk which would return a non-existent value will return empty, not missing value. The missing value exists primarily for working with external sources which make a distinction between an empty value and one which doesn’t exist.
• Synonyms: nil, null
• new in 1.56
• Related: empty, nil, null