MARC 21 Concise Community Information: Leader and Directory
This is an ARCHIVED VERSION of the 2000 electronic
edition of the MARC 21 Concise Formats. Please see www.loc.gov/marc/concise/
for the most up-to-date version of the electronic MARC 21 Concise Formats.
A fixed field that comprises the first 24 character positions
(00-23) of each record and provides information for the
processing of the record.
Character Positions
- 00-04 - Record length
The computer-generated, five-character numeric string
that specifies the length of the entire record. The number is
right justified and each unused position contains a
zero.
- 05 - Record status
A one-character code that indicates the relationship of
the record to a file.
- c - Corrected or revised
- d - Deleted
- n - New
- 06 - Type of record
A code that indicates the characteristics of and defines
the components of the record.
- q - Community information
- 07 - Kind of data
A one-character code that indicates the kind of data
contained in the record.
- n - Individual
The information relates to an individual with a
particular expertise.
- o - Organization
The information relates to an organization or
group.
- p - Program or service
The information relates to an activity of an
organization that reflects the organization's
purpose.
- q - Event
The information relates to a scheduled
happening.
- z - Other
The information relates to an entity other than
those specified by the other defined codes (e.g., a facility
such as a planetarium on a university
campus.)
- 08 - Undefined character
position
Contains a blank (#)
- 09 - Character coding scheme
A one-character code that identifies the character coding scheme used in the record.
- 10 - Indicator count
The computer-generated number 2 that indicates the number
of character positions used for indicators in a variable data
field.
- 11 - Subfield code length
The computer-generated number 2 that indicates the number
of character positions used for each subfield code in a variable
data field.
- 12-16 - Base address of data
The computer-generated, five-character numeric string
that indicates the first character position of the first
variable control field in a record. The number is right
justified and each unused position contains a
zero.
- 17-19 - Undefined character positions
Each contains a blank (#)
- 20-23 - Entry map
Four computer-generated, single-digit numeric characters
that indicate the structure of each entry in the
Directory.
- 20 - Length of the length-of-field
portion
Contains a 4
- 21 - Length of the
starting-character-position portion
Contains a 5
- 22 - Length of the implementation-defined
portion
Contains a 0
- 23 - Undefined
Contains a 0
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A computer-generated index to the location of the variable
control and data fields within a record. The Directory
immediately follows the Leader at character position 24 and
consists of a series of fixed-length (12 character positions)
entries that give the tag, length, and starting character
position of each variable field.
Character Positions
- 00-02 - Tag
Three numeric or alphabetic (uppercase or lowercase, but
not both) characters that identify an associated
field.
- 03-06 - Field length
Four numeric characters that indicate the length of the
field, including indicators, subfield codes, data, and the field
terminator. The number is right justified and each unused
position contains a zero.
- 07-11 - Starting character position
Five numeric characters that indicate the starting
character position of the field relative to the Base address of
data (Leader/12-16) of the record. The number is right
justified and each unused position contains a
zero.
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