The leader has no indicators or subfield codes; the data elements are
positionally defined.
00-04 Record length
05 Record status
a Increase in encoding level
c Corrected or revised
d Deleted
n New
o Obsolete
s Deleted; heading split into two or more headings
x Deleted; heading replaced by another heading
06 Type of record
z Authority data
07-08 Undefined character positions
Contains a blank (^) or a fill (|) character
09 Character coding scheme
^ MARC-8
a UCS/Unicode
10 Indicator count
11 Subfield code length
12-16 Base address of data
17 Encoding level
n Complete authority record
o Incomplete authority record
18-19 Undefined character positions
Contains a blank (^) or a fill (|) character
20-23 Entry map