This archived version of the 2007 edition of the MARC 21 Concise Formats is made available to help translators of the formats with their updating activities.The red passages indicate the changes to the 2006 concise edition that were incorporated into the 2007 concise edition.
The MARC 21 Concise Formats are officially published online once a year (usually in October through December). It uses red highlights to indicate changes made from the previous published edition.
The MARC 21 formats are widely used standards for the representation and exchange of authority, bibliographic, classification, community information, and holdings data in machine-readable form. They consist of a family of five coordinated formats: MARC 21 Format for Authority Data; MARC 21 Format for Bibliographic Data; MARC 21 Format for Classification Data; MARC 21 Format for Community Information; and MARC 21 Format for Holdings Data. Each of these MARC formats is published separately to provide detailed field descriptions, guidelines for applying the defined content designation (with examples), and identification of conventions to be used to insure input consistency. The MARC 21 Concise Formats provide in a single publication a quick reference guide to the content designators defined in each MARC format. It provides a concise description of each field, each character position of the fixed-length data element fields, and of the defined indicators in the variable data fields. Descriptions of subfield codes and coded values are given only when their names may not be sufficiently descriptive. Examples are included for each field.
MARC format characteristics that are common to all of the formats are described in this general introduction. Information specific only to certain record types is given in the introduction to the MARC format to which it relates.
A MARC record is composed of three elements: the record structure, the content designation, and the data content of the record. The record structure is an implementation of the American National Standard for Information Interchange (ANSI/NISO Z39.2) and its ISO equivalent ISO 2709. The content designation--the tags, codes, and conventions established explicitly to identify and further characterize the data elements within a record and to support the manipulation of that data are defined by each of the MARC formats. The content of the data elements that comprise a MARC record is usually defined by standards outside the formats, such as the International Standard Bibliographic Description (ISBD), Anglo-American Cataloguing Rules, 2nd edition (AACR 2), Library of Congress Subject Headings (LCSH), Holdings Statements Summary Level (ISO 10324), American National Standard for Serial Holdings Statements (ANSI/NISO Z39.44), Library of Congress Classification (LCC), or other conventions used by the organization that creates a record. The content of certain coded data elements (e.g., the Leader, fields 007 and 008) is defined in the MARC formats themselves.
The MARC record structure consists of three main components: the Leader, the Directory, and the Variable Fields. The following information summarizes the components of a MARC record. More detail is provided in MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media.
Within variable data fields, the following two kinds of content designation are used:
A MARC 21 record may contain data in multiple scripts. One script may be considered the primary script of the data content of the record, even though other scripts are also used for data content. (Note: ASCII is used for the structure elements of the record, with most coded data also specified within the ASCII range of characters.) Graphic models for multiscript data are described in the "Multiscript Records" sections, located at the end of each format.
Theoretically, all fields and subfields may be repeated. The nature of the data, however, often precludes repetition. For example, a record may contain only one 1XX field; a bibliographic field 100 may contain only one subfield $a (Personal name) but may contain more than one subfield $c (Titles and other words associated with a name). Field and subfield repeatability/nonrepeatability is indicated by (R) or (NR) following each field and subfield in each MARC 21 format.
A fill character (ASCII 7C hex), represented in this document as a vertical bar (|), may be used in a record when the format specifies a code to be used but the creator of the record decides not to attempt to supply a code. A fill character may not be used in any character position of the leader or tags, indicators, or subfield codes. The use of the fill character in records contributed to a national database may also be dependent upon the national level requirements specified for each data element.
Code u (Unknown or unspecified), when it is defined, is used to indicate that the creator of the record attempted to supply a code but was unable to determine what the appropriate code should be.
Code n (Not applicable), when it is defined, is used to indicate that the characteristic defined by the position is not applicable to a specific type of item or kind of record.
A display constant is a term, phrase, and/or spacing or punctuation convention that may be system generated to make a visual presentation of data in a record more meaningful to a user. The display text is not carried in the record but an indication for it, based on tags, indicators, subfield codes, or coded values, is. Suggested display constants and display examples are provided in each MARC 21 format. The use and display of these constants is determined by each organization or system.
In unmodified records, the organization identified as the original cataloging source in 008/39 and/or 040 $c (Transcribing agency) is responsible for the data content of the record. The organizations identified as the transcribing agency in field 040 is responsible for the content designation and transcription of the data.
In modified records, organizations identified in field 040 $a (Original cataloging agency) and $d (Modifying agency) are collectively responsible for the data content of the record. Organizations identified as transcribing or modifying agencies in field 040 $c and $d are collectively responsible for the content designation and transcription of the data.
An agency-assigned data element is one whose content is determined by a designated agency and is the responsibility of that agency, e.g., field 222 (Key Title) which is the responsibility of an ISSN Center. While it is usually input by the designated agency, it may be transcribed by another organization.
Certain data elements contain data from controlled lists maintained by designated agencies, e.g., the MARC Code List for Geographic Areas in field 043 (Geographic Area Code) of the bibliographic format.
These elements are indicated at the field or subfield level in MARC 21 and only values from the designated lists may be used. If a change or addition is desirable for a list, the maintenance agency for the list should be consulted.
Obsolete content designators are not included in this document. A Web listing is available under the MARC Field Lists at: www.loc.gov/marc/. An obsolete content designator is not used in new records. It may appear in records that were created prior to the time that it was made obsolete.
Throughout this document, the following typographical conventions are used:
The acronyms and initialisms that are used in the MARC 21 Concise Formats are only briefly defined here. Detailed explanations may be found in the relevant documentation named in the brief definition, the MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media, and/or one of the five MARC 21 communications format publications.
The MARC 21 Concise Formats are prepared by the Network Development and MARC Standards Office. The web version may contain some information not yet available in the printed version of this documentation as it is updated more often, Direct any questions related to the content of this document to the Library of Congress, Network Development and MARC Standards Office, 101 Independence Ave., S.E., Washington, DC 20540-4402 (FAX +1-202-707-0115). Correspondence may also be sent to the office email account at: firstname.lastname@example.org.
The following list gives the MARC 21 format documents whose data elements have been incorporated into this edition of the MARC 21 Concise Formats :