Schlagwort-Normdaten
          
               
               
               
MARC21       683     Application 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)
             $p   Corresponding classification field (R)
             $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 General application
             1 Special arrangement of classification topics
             2 Optional classification
             2nd: Undefined; contains a blank (#)