Schlagwort-Normdaten
          
               
               
               
MARC21       684     Auxiliary Instruction Note (R)
  Subfields: 
             $a   Classification number--single number or beginning number of span (R)
             $c   Classification number--ending number of span (R)
             $i   Explanatory text (R)
             $j   Caption
             $y   Table identification--schedule (R)
             $z   Table identification--table number (R)
             $5   Institution to which field applies (R)
             $8   Link and sequence number

 Indic/etc.: 1st: Type of note
             0 Source entry
             1 Textual note
             2 Reference note
             2nd: Undefined; contains a blank (#)