| $2 || System Code or source || [[hold/2XX| 2-- block]]

| $2 || Link Text || [[hold/256|256]]

| $3 || Authority Record Number || [[hold/7XX| 7-- block]]

| $4 ||Relator Code || [[hold/7XX| 7-- block]]

| $6 || Interfield Linking Data || [[hold/5XX| 5-- block]]

| $7 ||Script of Field || [[hold/2XX| 2-- block]]; [[hold/3XX|3-- block]]; [[hold/5XX|5-- block]]