The archive_class relation is used to find the archive class and association class when the pipeline data_id is known. C3 The pipeline OSF data_id used to archive datasets. Multiple data_id values may have the same archive class. C3 This is an all uppercase value used to categorize datasets being archived. This value is one of the items used to construct the unique DADSFile name. C3 When this field is not blank, it indicates the archive_class used for the association table. A single archive request for a data_id used for associated datasets may involve two archive classes. This field names the second class that only contains the association table. ARCHIVE_CLASS_MAP_TYPE This table specifies the archive class for a OSF data_id. OPUS unique clustered