question: returns the attribute value , or null if there was an error concode_field_sep boolean wasInd concode_elem_sep EvaluationResult trueBooleanResult concode_elem_sep AttributeValue value concode_elem_sep Status status concode_elem_sep EvaluationResult falseBooleanResult concode_field_sep EvaluationResult getTrueInstance concode_elem_sep boolean indeterminate concode_elem_sep EvaluationResult getInstance concode_elem_sep Status getStatus concode_elem_sep EvaluationResult getFalseInstance
target: AttributeValue function ( ) { return value ; }