MARC 21 Concise Classification: Control Fields (001-008)
This is an ARCHIVED VERSION of the 2000 electronic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.
Fields 001-008 contain the record number and other control and coded information
that are used in processing MARC 21 classification records. Each control field
is identified by a field tag in the Directory and contains either a single data
element or a series of fixed-length data elements identified by relative character
position. Control fields contain neither indicator positions nor subfield codes.
The control number assigned by the organization creating, using, or distributing the
record.
Example
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The MARC code for the agency whose system control number is present in field 001
(Control Number). The source of the code is the MARC
Code List for Organizations that is maintained by the Library of Congress.
For Canadian organizations, the source of the code is Symbols
and Interlibrary Loan Policies in Canada that is maintained by the National
Library of Canada.
Whenever the number in field 001 is changed, agencies must assure that the MARC code
in field 003 applies to the new number found in field 001.
Examples
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Sixteen characters that indicate the date and time of the latest record transaction and serve
as a version identifier for the record. They are recorded according to
Representation of Dates and Times (ISO 8601). The date
requires 8 numeric characters in the pattern
yyyymmdd. The time requires 8 numeric characters in the in
the pattern
hhmmss.f, expressed in terms of the 24-hour (00-23)
clock.
Example
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Fourteen character positions (00-13) that contain positionally-defined data elements that
provide coded information about the record as a whole or about special aspects of the 1XX
classification number or explanatory index term field. Each character position must contain
either a defined code or a fill character ( | ).
Character Positions
- 00-05 Date entered on file
The computer-generated, six-character numeric string that indicates the date the MARC
21 record was created. The date is recorded in the pattern
yymmdd.
- 06 - Kind of record
A one-character code that indicates the source of the data in the 1XX field.
- a - Schedule record
- b - Table record
- c - Index term record
- 07 - Type of number
A one-character code that indicates the type of number contained in field 153
(Classification Number).
- a - Single number
- b - Defined number span
- c - Summary number span
- n - Not applicable
- 08 - Classification validity
A one-character code that indicates the validity of the classification number contained in
field 153.
- a - Valid
- b - First number of span
invalid
- c - Last number of span
invalid
- d - Completely invalid
- e - Obsolete
- n - Not applicable
- 09 - Standard or optional
designation
A one-character code that indicates whether the classification number
contained in field 153 is from the standard or optional part of the schedules or tables of the
scheme identified in field 084 (Classification Scheme and Edition).
- a - Standard
- b - Optional
- n - Not applicable
- 10 - Record update in process
A one-character code that indicates whether a change in any field in a record is being
considered.
- a - Record can be used
- b - Record is being updated
- 11 - Level of establishment
A one-character code that indicates the extent to which the formulation of the
classification
number or index term contained in the 1XX field conforms to the scheme identified
in field 084.
- a - Fully established
- c - Provisional
- 12 - Synthesized number indication
A one-character code that indicates whether field 153 contains a synthesized classification
number or number span.
- a - Not synthesized
- b - Synthesized
- n - Not applicable
- 13 - Display controller
A one-character code that indicates the type of display appropriate for the classification
number or index term contained in the 1XX field.
- a - Displayed in standard schedules or tables
- b - Extended display
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