TECHNICAL NOTICE (December 11, 2025)
Additions to Source Codes for Vocabularies, Rules, and Schemes
Network Development and MARC Standards Office
Library of Congress
The source codes listed below have been recently approved.
The codes will be added to the applicable
Source Codes for
Vocabularies, Rules, and Schemes lists.
See the specific source code list for current usage
in MARC fields and MODS/MADS elements.
The codes should not be used in exchange records until 60 days
after the date of this notice to provide implementers time to
include the newly-defined code in any validation tables.
Cartographic Data Source Codes
The following source codes have been added to the
Cartographic Data Source Codes list for usage in appropriate fields and elements.
- Additions:
- azcor - Arizona coordinates (ALA: MAGIRT)
- bbcou - Bounding boxes for countries (Humanitarian Data Exchange)
- bbusc - Bounding boxes for all US counties (Anthony Louis D'Agostino)
- bbuss - Bounding boxes for all US states (Anthony Louis D'Agostino)
- cacor - California county coordinates (ALA: MAGIRT)
- coubb - Country bounding boxes (Graydon Hoare)
- iacor - Iowa county coordinates (ALA: MAGIRT)
- ilcor - Illinois county coordinates (ALA: MAGIRT)
- incor - Indiana state coordinates (ALA: MAGIRT)
- micor - Michigan state coordinates (ALA: MAGIRT)
- mncor - Minnesota county coordinates (ALA: MAGIRT)
- mocor - Missouri county coordinates (ALA: MAGIRT)
- nvcor - Nevada county coordinates (ALA: MAGIRT)
- ohcor - Ohio state coordinates (ALA: MAGIRT)
- stbbc - State bounding boxes (Crash Magic on Government Tools)
- stbbg - State bounding boxes (Greg Larrenaga)
- usbbs - U.S. state bounding boxes by state (Ryan Murphy)
- uscbb - U.S. county bounding boxes (Ryan Murphy)
- ussc - United States state coordinates (ALA: MAGIRT)
- utcor - Utah state coordinates (ALA: MAGIRT)
- wycor - Wyoming state coordinates: including national parks and monuments, and the Wind River Indian Reservation (ALA: MAGIRT)
Standard Identifier Source Codes
The following source codes have been added to the
Standard Identifier Source Codes list for usage in appropriate fields and elements.
- Additions:
- schins - ScholarGPS institution (ScholarGPS)
- schsch - ScholarGPS scholar (ScholarGPS)
The Library of Congress, Network Development and MARC Standards Office provides
information about existing and newly assigned MARC codes on its Web site
(aj.sunback.homes/marc/) as well
as notices such as these to subscribers to its MARC listserv.
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