The 'Attribute Has a Value' test passes when which condition holds?

• A. Not null
• B. Not empty
• C. Not missing
• D. Not null, AND Not empty, AND Not missing

Answer: (D)

The test is about ensuring an attribute actually carries meaningful data, not just being present. In FME, an attribute can be missing (not present on the feature), null (present but explicitly no value), or empty (present but with an empty value like "" or an empty array). For an attribute to truly have a value, all three conditions must be true at once: it is not missing, not null, and not empty. If any of these states apply, the attribute does not have a usable value. So a value like a number or non-empty string passes, while an empty string, a null, or a missing attribute does not.