--Leader and Directory--
LEADER
Character Positions
00-04 - Logical record length
05 - Record status
a - Increase in encoding level
c - Corrected or revised
d - Deleted
n - New
p - Increase in encoding level from prepublication
06 - Type of record
a - Language material
b - Archival and manuscripts control [OBSOLETE]
c - Notated music
d - Manuscript notated music
e - Cartographic material
f - Manuscript cartographic material
g - Projected medium
h - Microform publications [OBSOLETE]
i - Nonmusical sound recording
j - Musical sound recording
k - Two-dimensional nonprojectable graphic
m - Computer file
n - Special instructional material [OBSOLETE]
o - Kit
p - Mixed material
r - Three-dimensional artifact or naturally occurring object
t - Manuscript language material
07 - Bibliographic level
a - Monographic component part
b - Serial component part
c - Collection
d - Subunit
i - Integrating resource
m - Monograph/item
s - Serial
08 - Type of control
# - No specific type
a - Archival
09 - Character coding scheme
# - MARC-8
a - UCS/Unicode
10 - Indicator count
11 - Subfield code count
12-16 - Base address of data
17 - Encoding level
# - Full level
1 - Full level, material not examined
2 - Less-than-full level, material not examined
3 - Abbreviated level
4 - Core level
5 - Partial (preliminary) level
7 - Minimal level
8 - Prepublication level
u - Unknown
z - Not applicable