R - Record pointer, link between tables using record IDs
Code of field: R (for Record Link)
Type of field: Link to records of another and associated table. This kind of table is called target table.
Applicable to:
List of records that should be linked. A link can point to another table, but also to itself. This can be used in a very large number of scenarios. Ex.: link between strains (table 1) and species names (table 2).
Comments:
Use of the Undo or the Redo options is possible.