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General Information

• Introductory MARC Information
• News and Announcements
• MARC Forums (Listservs)
• Recommended Reading

Introductory MARC Information

• Frequently Asked Questions (FAQ)
• The MARC 21 Formats: Background and Principles
• About the Network Development and MARC Standards Office, Library of Congress
  • Contact at: [email protected]
• About the Metadata Services, British Library
  • Contact at: [email protected]
• About the Standards division, Library and Archives Canada
  • Contact at: [email protected]
• About MARC 21 in the German National Library
  • Contact at: [email protected]

News and Announcements

General Announcements

• MARC and RDA Relators Reconciled (May 2013)
• MARC Code Lists Available as Linked Data (January 2011)
• MARC 21: Harmonized USMARC and CAN/MARC (October 1998)
• RFC2220 on Internet Media Type for MARC (May 1998)

Format Documentation

• MARC 21 Update No. 25 Full and Concise available online (December 2017)
• MARC 21 Update No. 24 Full and Concise available online (May 2017)
• MARC 21 Update No. 23 Full and Concise available online (November 2016)
• MARC 21 Update No. 22 Full and Concise available online (April 2016)
• MARC 21 Update No. 21 Full and Concise available online (September 2015)
• MARC 21 Update No. 20 Full and Concise available online (April 2015)
• MARC 21 Update No. 19 Full and Concise available online (October 2014)
• MARC 21 Update No. 18 Full and Concise available online (April 2014)
• MARC 21 Update No. 17 Full and Concise available online (September 2013)
• MARC 21 Update No. 16 Full and Concise available online (April 2013)
• MARC 21 Update No. 15 Full and Concise available online (September 2012)
• MARC 21 Update No. 14 Full and Concise available online (April 2012)
• MARC 21 Update No. 13: Full and Concise available online (September 2011)
• MARC 21 Update No. 12: Full and Concise available online (October 2010)
• MARC 21 Update No. 11: Full and Concise available online (February 2010)
• MARC 21 Update No. 10: Full and Concise available online (October 2009)
• MARC 21 Update No. 9: Full and Concise available online (October 2008)
• 2007 Edition of the MARC 21 Concise available online (June 2008)
• MARC 21 Full formats join the Concise online (May 2008)
• MARC 21 Update No. 8 (May 2008)
• MARC Code List for Languages (December 2007)
• 2007 Edition of the MARC Code List for Languages available online (October 2007)
• 2006 Edition of the MARC 21 Concise Formats (October 2007)
• Update 7: MARC 21 Format for Authority Data (October 2006)
• Update 7: MARC 21 Format for Bibliographic Data (October 2006)
• Update 7: MARC 21 Format for Classification Data (October 2006)
• Update 7: MARC 21 Format for Community Information (October 2006)
• Update 7: MARC 21 Format for Holdings Data (October 2006)
• Update 6: MARC 21 Format for Authority Data (October 2005)
• Update 6: MARC 21 Format for Bibliographic Data (October 2005)
• Update 6: MARC 21 Format for Classification Data (October 2005)
• Update 6: MARC 21 Format for Holdings Data (October 2005)
• 2005 Edition of the MARC 21 Concise Formats (May 2006)
• MARC Code List for Geographic Areas (May 2006)
• Update 5: MARC 21 Format for Authority Data (October 2004)
• Update 5: MARC 21 Format for Bibliographic Data (October 2004)
• Update 5: MARC 21 Format for Classification Data (October 2004)
• Update 5: MARC 21 Format for Community Information (October 2004)
• Update 5: MARC 21 Format for Holdings Data (October 2004)
• MARC 21 Concise Formats (July 2004)
• Understanding MARC Authority Records (July 2004)
• Update 4: MARC 21 Format for Authority Data (October 2003)
• Update 4: MARC 21 Format for Bibliographic Data (October 2003)
• Update 4: MARC 21 Format for Classification Data (October 2003)
• Update 4: MARC 21 Format for Community Information (October 2003)
• Update 4: MARC 21 Format for Holdings Data (October 2003)
• MARC Code List for Countries (August 2003)
• Understanding MARC Authority Records (June 2003)
• Understanding MARC Bibliographic (June 2003)
• MARC Code List for Languages (May 2003)
• MARC 21 Concise Formats (April 2003)
• Update 3: MARC 21 Format for Authority Data (October 2002)
• Update 3: MARC 21 Format for Bibliographic Data (October 2002)
• Update 3: MARC 21 Format for Classification Data (October 2002)
• Update 3: MARC 21 Format for Community Information (October 2002)
• Update 3: MARC 21 Format for Holdings Data (October 2002)

Change Announcements

• Addition to MARC Code List for Languages (December 21, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (December 01, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 21, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (October 20, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 15, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 25, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 28, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 13, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 21, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (May 19, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 24, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 10, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 24, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 17, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 27, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 13, 2017)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (December 02, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 02, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 28, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 15, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 05, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 29, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 09, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 07, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 26, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 19, 2016)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (December 9, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 12, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (October 22, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 08, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 14, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 26, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 23, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 13, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 04, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 23, 2015)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 14, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (October 22, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 18, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 12, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 18, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 3, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 6, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 14, 2014)
• Additions to the MARC Code List for Relators (February 21, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 30, 2014)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 13, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (November 8, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 26, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 28, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 26, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 26, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 19, 2013)
• Additions to the MARC Code List for Relators (May 31, 2013) -- revised June 27, 2013
• Additions to Source Codes for Vocabularies, Rules, and Schemes (May 29, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 25, 2013)
• Additions to Value Lists for Codes and Controlled Vocabularies (April 25, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 22, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 22, 2013)
• Additions to Value Lists for Codes and Controlled Vocabularies (February 05, 2013)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (October 04, 2012)
• Additions to Value Lists for Codes and Controlled Vocabularies (October 03, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 14, 2012)
• Additions to Value Lists for Codes and Controlled Vocabularies (September 14, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 29, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 11, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 27, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 20, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (March 28, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 26, 2012)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (December 23, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (December 14, 2011)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (December 6, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 23, 2011)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (August 15, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (July 15, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 14, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (May 20, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 22, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 13, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (February 9, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (January 5, 2011)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (October 15, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 24, 2010)
• Additions to MARC Code List for Relators (September 3, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (September 3, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (August 27, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (June 29, 2010)
• Additions to Value Lists for Codes and Controlled Vocabularies (June 29, 2010)
• Changes to Source Codes for Vocabularies, Rules, and Schemes (June 18, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (May 26, 2010)
• Additions to MARC Code List for Relators (May 4, 2010)
• Additions to Source Codes for Vocabularies, Rules, and Schemes (April 28, 2010)
• MARC Code List for Relators and Sources additions (January 26, 2010)
• MARC Code List for Relators and Sources additions (October 26, 2009)
• MARC Code List for Relators and Sources additions (September 30, 2009)
• MARC Code List for Relators and Sources additions (July 30, 2009)
• MARC Code List for Relators and Sources additions (April 22, 2009)
• MARC Code List for Relators and Sources additions (February 19, 2009)
• MARC Code List for Relators and Sources additions (February 18, 2009)
• MARC Code List for Relators and Sources additions (January 23, 2009)
• MARC Code List for Languages changes (January 6, 2009)
• MARC Code List for Relators and Sources additions (December 16, 2008)
• MARC Code List for Relators and Sources additions (October 10, 2008)
• MARC Code List for Relators and Sources additions (September 15, 2008)
• MARC Code List for Relators and Sources additions (August 22, 2008)
• MARC Code List for Relators and Sources additions (July 25, 2008)
• MARC Code List for Languages changes (July 01, 2008)
• MARC Code List for Relators and Sources additions (April 25, 2008)
• MARC Code List for Relators and Sources additions (March 28, 2008)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (March 25, 2008)
• MARC Code List for Relators and Sources additions (January 18, 2008)
• MARC Code List for Relators and Sources additions (December 18, 2007)
• MARC Code List for Relators and Sources additions (November 30, 2007)
• MARC Code List for Relators and Sources additions (November 16, 2007)
• MARC Code List for Languages additions (October 22, 2007)
• MARC Code List for Relators and Sources additions (September 28, 2007)
• MARC Code List for Relators and Sources additions (September 13, 2007)
• MARC Code List for Relators and Sources additions (August 13, 2007)
• MARC Code List for Relators and Sources additions (July 13, 2007)
• MARC Code List for Relators and Sources additions (April 5, 2007)
• MARC Code List for Relators and Sources additions (March 1, 2007)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (February 28, 2007)
• MARC Code List for Relators and Sources additions (January 26, 2007)
• MARC Code List for Relators and Sources additions (January 5, 2007)
• MARC Code List for Relators and Sources additions (November 14, 2006)
• MARC Code List for Relators and Sources additions (October 19, 2006)
• MARC Code List for Languages additions (October 17, 2006)
• MARC Code List for Relators and Sources additions (September 29, 2006)
• MARC Code List for Relators and Sources additions (August 29, 2006)
• MARC Code List for Relators and Sources additions (June 23, 2006)
• MARC Code List for Relators and Sources additions (May 26, 2006)
• MARC Code List for Relators and Sources additions (March 10, 2006)
• MARC Code List for Languages additions (February 23, 2006)
• MARC Code Lists for Relators and Sources additions (January 10, 2006)
• MARC Code Lists for Relators and Sources additions (October 12, 2005)
• MARC Code List for Languages additions (August 30, 2005)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (July 12, 2005)
• MARC Code Lists for Relators and Sources additions (June 17, 2005)
• MARC Code Lists for Relators and Sources addition (May 20, 2005)
• MARC Code Lists for Relators and Sources addition (February 9, 2005)
• MARC Code Lists for Relators and Sources additions (February 2, 2005)
• MARC Code List for Languages additions (January 19, 2005)
• MARC Code Lists for Relators and Sources additions January 5, 2005) - Revised
• MARC Code Lists for Relators and Sources additions (January 5, 2005)
• MARC Code Lists for Relators and Sources additions (November 15, 2004)
• MARC Code Lists for Relators and Sources additions (September 15, 2004)
• MARC Code Lists for Relators and Sources additions (July 27, 2004)
• MARC Code Lists for Relators and Sources additions (June 29, 2004)
• MARC Code Lists for Relators and Sources additions (June 21, 2004)
• MARC Code Lists for Relators and Sources additions (April 28, 2004)
• MARC Code Lists for Relators and Sources additions (April 27, 2004)
• MARC Code Lists for Relators and Sources additions (April 6, 2004)
• MARC Code Lists for Relators and Sources additions (March 16, 2004)
• MARC Code Lists for Relators and Sources additions (February 5, 2004)
• MARC Code List for Languages additions (November 21, 2003)
• MARC Code Lists for Relators and Sources additions (October 2003)
• MARC Code Lists for Relators and Sources additions (June 20, 2003)
• MARC Code Lists for Relators and Sources additions (April 11, 2003)
• MARC Code Lists for Relators and Sources additions (March 13, 2003)
• MARC Code List for Languages additions (March 10, 2003)
• MARC Code Lists for Relators and Sources additions (January 17, 2003)
• MARC Code List for Languages additions (October 29, 2002)
• MARC Code List for Geographic Areas additions (August 28, 2002)
• MARC Code List for Countries/MARC Code List for Geographic Areas additions (June 2002)

Implementations Announcements

• LC Plan to Accommodate the 13-Digit ISBN
• New MARC 21 Data Elements in LC Bibliographic and Authority Records (June 2002)
• Test Files Available Containing New MARC 21 Data Elements (June 2001)
• Changes in MARC Distribution Services - LCCN Restructuring, New MARC Characters, MDS Frequency (November 2000)
• Implementation of Change in Indicator Value for Multiple Surnames in MARC 21 (November 1999)
• Subject Authority Data Elements and Form/Genre Implementation (June 1998)

Year 2000 Information

• MARC and the Year 2000 (March 1998)
• Library of Congress Control Number (LCCN) - Restructuring to Accommodate Century Change (revised October 1999)

MARC Forum (Listserv)

• About the MARC Forum
  • Search and Browse the MARC Forum Message Archives
  • Join or Leave the MARC Forum

Recommended Reading

• A Brief Bibliography of Writings on MARC
• Understanding MARC Bibliographic: Machine-Readable Cataloging
• Understanding MARC Authority Records: Machine-Readable Cataloging

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