This field is no longer meaningful and is kept for backwards compatibility. Previous to Version 6 tables could be set up without a primary Index (a True table). Valid values are:
- P—Pointer table
- T—True table
As of Version 6, all tables are Pointer tables. The term pointer table indicates the combination of the Index and a Data Table. The use of an Index improves efficiency of insert and delete operations in sequential tables and reduces memory requirements for Hash tables.