General Information
Introduction
Source Code Lists
Arrangement of each Source
Code List
Source Code Use
Structure of the Source
Codes
Source Code
Maintenance
Introduction
Source Codes contains value lists of controlled vocabularies of terms (e.g., subject terms), codes (e.g., language codes), identifiers (e.g., standard identifiers), or for specific data formulation rules (e.g., RDA) or schemes (e.g., DDC). The vocabularies, rules, and schemes are generally referred to as the source of the value data, and the source is identified in data formats in order to support interpretation of data values that come from these sources. The Source Codes are presented as separate lists for different types of sources, for example, subject sources, classification sources, date scheme sources.
Source Code Lists
Abbreviated
Title Source Codes
Access
Restriction Term Source Codes
Accessibility Content Source Codes
Availability
Status Code Source Codes
Caption
Abbreviation Source Code
Cartographic Data
Source Codes
Citation Scheme Source
Codes
Classification Scheme
Source Codes
Content Advice
Classification Source Codes
Copyright
and Legal Deposit Number Source Codes
Country Code and Term Source
Codes
Curriculum
Objective Code and Term Source Codes
Date and Time Scheme
Source Codes
Description
Convention Source Codes
Entity Type Source Codes
Fingerprint Scheme
Source Codes
Format Source
Codes
Frequency of Issue Code
and Term Source Codes
Function Term Source
Code
Gender Code and Term Source
Codes
Genre/Form Code and Term
Source Codes
Geographic Area Code
and Term Source Codes
Holdings Scheme
Source Codes
Human Services Code
Source Codes
Language Code and Term
Source Codes
Musical
Composition Form Code Source Codes
Musical Incipit
Scheme Source Codes
Musical
Instrumentation and Voice Code and Term Source
Codes
Name and Title Authority
Source Codes
National
Bibliography Number Source Codes
Occupation Term Source
Codes
Organization Code
Source Codes
Price Type Code Source
Codes
Program Code Source
Codes
Relator and Role Code
and Term Source Codes
Resource Action Term
Source Codes
Script
Code and Term Source Codes
Standard
Identifier Source Codes
Subject Category
Code Source Codes
Subject Heading and Term
Source Codes
Target Audience Code
and Term Source Codes
Taxonomic Classification
Source Codes
Temporal Term Source Codes
Thematic Index Code
Source Codes
Transliteration Scheme Code Source Codes
Alternative pathways to the Source Code lists are via:
- Composite MARC Field Index to Source Code Usage
- Individual MARC fields descriptions
- MODS Outline of Elements and Attributes
- MODS Guidance for Record Creation
Arrangement of each Source Code List
Entries in the each Source Code list are arranged in alphabetical order by the code and consist of the source code followed by the bibliographic citation for the source documentation. If online documentation of a source list is known, the citation is linked.
Source Code Use
These codes may be used wherever there is a need to refer to a controlled vocabulary, rule set, or scheme, but in particular they are intended for use with MARC and MODS/MADS data.
For newly assigned codes, a date is given before which the code should not be included in exchange records. The date represents a 60-day waiting period required to allow MARC and MODS/MADS implementers time to add newly assigned codes to any validation tables they may use to check the codes recorded in records. Implementers may use newly assigned codes in their internal systems immediately as long as records containing new codes are not distributed until after the waiting period.
Structure of the Source Codes
The general guidelines for codes contained in this documentation are the following. Codes are composed of lowercase alphabetic characters, and, in some cases, numeric characters 0 through 9 and the hyphen (-). Codes vary in length, but most codes have a maximum of 12 characters. Codes are usually based on the title or numbering of the documentation.
The code may be followed by the addition of edition, language, or date of publication of the source documentation. The code is separated from the addition by a slash (/). Examples:
msdocs/1975
sears/12th
Instead of the full name of a language, the 3-character MARC language code should be used when the code addition for language is needed. Example:
fei/eng
Omission of the edition, language, or year will imply that the assigning institution used the edition that was current when the record was created.
Source Code Maintenance
The Library of Congress is the maintenance agency for the source code lists at the site. All assignments are made as the result of an official request. Please send requests for the assignment of new source codes and questions about existing code assignments to: Network Development and MARC Standards Office, Library of Congress, 101 Independence Avenue, S.E., Washington, DC 20540-4402, USA; Fax: +1-202-707-0115; Email: [email protected]. Requests for the assignment of a new source code should include a full bibliographic citation for the source documentation or web site for the code or term list, code or term database, scheme (e.g., for classification schedules), or rules (e.g., for description conventions). For printed sources, include a copy of the title page. For online sources, include the URL.
Notices announcing additions or changes to assigned codes and their related citations are distributed prior to the date they should be used in records in the News and Announcements section of the MARC site.