386 Subfield $i - Relationship information:

Subfield $i contains the designation of a relationship between one or more members of the demographic group recorded in the 386 field and the 1XX entity in the record.  This may be an uncontrolled textual phrase or a controlled textual value from a list of relationships.

Example:

130  #0  $aChristmas with the children of France

386  ##  $iPerformer:$aChildren$aFrench$2[source code for controlled vocabulary]