MARC21       883     Machine-generated Metadata Provenance (R)
             $a   Generation process
             $b   Confidence value
             $d   Generation date
             $q   Generation agency
             $x   Validity end date
             $u   Uniform Resource Identifier
             $w   Bibliographic record control number (R)
             $0   Authority record control number or standard number (R)
             $8   Field link and sequence number (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 (#)

2013 -05 -02
Auszug aus der allegro - Formatedatenbank
(c)2005 UB Braunschweig