X62 Subfield $i - Relationship information: [462, 562, 762]
Subfield $i contains the designation of a relationship of the entity in a 462, 562, or 762 field to the 1XX entity in the record or a textual reference instruction phrase. For fields 462 and 562 the phrase may be system-generated from the field tag or from the codes defined for subfield $w (Control subfield). Subfield $i is appropriate only in fields 462, 562, and 762.
Guidelines for using subfield $i: