The bibliographic record leader contains 24 Bytes of data. The leader is followed by record directory entries. There are no field terminators between the leader and the record directory or record directory entries.
In OCLC-MARC Records, any element, Value, field, subfield, etc., marked obsolete is no longer valid. Current records will not contain these invalid codes. However, records supplied from archives may contain obsolete MARC coding.
Ind = Indicator | SFC = Subfield code | R = Repeatable | NR = Nonrepeatable | = Blank
Note: Mnemonics that appear on workforms and record displays follow the leader label.
Byte | Value | Definition |
---|---|---|
00-04 |
Record Length
|
|
05 | Record Status (Rec stat) | |
a | Increase in encoding level | |
c | Corrected or revised | |
n | New | |
p | Increase in encoding level from prepublication | |
06 | Type of Record (Type) | |
a | Language of material | |
b |
Archival and manuscripts control Note: Value obsolete |
|
c | Printed music | |
d | Manuscript music | |
e | Cartographic material | |
f | Manuscript cartographic material | |
g | Projected medium | |
i | Nonmusical sound recording | |
j | Musical sound recording | |
k | 2-dimensional nonprojectable graphic | |
m | Computer file | |
o | Kit | |
p | Mixed material | |
r | 3-dimensional artifact or naturally occurring object | |
t | Manuscript language material | |
07 | Bibliographic Level (BLvl) | |
a | Monographic component part | |
b | Serial component part | |
c | Collection | |
d | Subunit | |
i | Integrating resources | |
m | Monograph or single manuscript | |
s | Serial | |
08 | Type of Control (Ctrl) | |
![]() |
No specified type | |
a | Archival | |
09 | Character Coding Scheme | |
![]() |
MARC-8 | |
a | UCS/Unicode | |
10 | 2 |
Indicator Count
|
Byte | Value | Definition |
---|---|---|
11 | 2 |
Subfield Code Count
|
12-16 |
Base Address of Data
|
|
17 |
Encoding Level (ELvl) | |
![]() |
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 | |
I | Full-level input by OCLC participants | |
J | Deleted record | |
K | Minimal-level input by OCLC participants | |
L |
Added from a batch process Note: Value obsolete |
|
M | Added from a batch process | |
18 |
Descriptive Cataloging Forms (Desc) | |
![]() |
Non-ISBD | |
a | AACR2 | |
c | ISBD Punctuation Omitted | |
i | ISBD | |
n | Non-ISBD Punctuation Omitted | |
u | Unknown | |
19 |
Linked Record Requirement | |
![]() |
Related record not required | |
20 | 4 |
Length of the Length-of-Field Portion
|
21 | 5 |
Length of the Starting-Character-Position Portion
|
Byte | Value | Definition |
---|---|---|
22 |
Transaction Type Code in Hexadecimal (OCLC defined)
Note: For historical information and a complete list of codes, see field 994. |
|
Prior to Nov. 12, 2006 | X'01' |
Produce
|
X'02' |
Update
|
|
X'03' |
Delete Holdings
|
|
X'11' |
Replace
|
|
X'50' |
All Produce
|
|
X'90' |
Offline Retrieve
|
|
X'92' |
Offline Update
|
|
X'93' |
Offline Delete Holdings
|
|
![]() |
Exported via CORC | |
e | Exported via Cataloging or OCLC Selection | |
x | Exported via OCLC Arabic Cataloging software, OCLC CatCD for Windows, OCLC CatME™ for Windows, or OCLC CJK™ software | |
After Nov. 12, 2006 | 0 | Transaction codes are stored in field 994. This change is present in all bibliographic records output from OCLC systems (Connexion client 1.60 stored transaction codes in field 994 and in Leader Byte 22). |
23 | 0 | Undefined |