A simple attribute may have a value from a particular primitive domain, from within a specified range. The range specified is inclusive; i.e., lowerAttributeValue and upperAttributeValue are considered valid, in addition to any values falling between them.
Note that this subclass is not used to define restrictions associated with the use of enumerations.
This subclass may be used by a restricted clause or as the means of expressing class attribute values, as indicated in TupleDefinition.