field-name
Specifies the name of a field in a record. The field-name must be
defined previously in a /FIELD qualifier.
condition-name
Specifies a condition-name that has been defined previously in a
/CONDITION qualifier.
new-contents
Specifies how the record is to be altered. The new-contents can
be a constant or a field-name that has been defined in a /FIELD
qualifier.