MARC 21 Format for Authority Data

National Level Requirements

Leader & Directory

1999 Edition
Update No. 1 (October 2001) through Update No. 12 (October 2010)

LEADER                                                      M
    00-04 Record length                                     M
    05    Record status                                     M
    06    Type of record                                    M
    07-08 Undefined character positions                     M
    09    Character coding scheme                           M
    10    Indicator count                                   M
    11    Subfield code count                               M
    12-16 Base address of data                              M
    17    Encoding level                                    M
    18-19 Undefined character positions                     M
    20    Length of the length-of-field portion             M
    21    Length of the starting-character-position         M
           portion
    22    Length of the implementation-defined portion      M
    23    Undefined                                         M

DIRECTORY                                                   M
    00-02 Tag                                               M
    03-06 Field length                                      M
    07-11 Starting character position                       M