MARC21       886     Foreign Marc Information Field (R)
  Subfields: 
             $a   Tag of the foreign MARC field
             $b   Content of the foreign MARC field
             $2   Source of data
             $a-z   Foreign MARC subfield (R)
             $0-9   Foreign MARC subfield (R)

 Indic/etc.: 1st: Type of field
             0 Leader
             1 Variable control fields (002-009)
             2 Variable data fields (010-999)
             2nd: Undefined; contains a blank (#)