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Network Working Group                                       R. GuentherRequest for Comments: 2220                          Library of CongressCategory: Informational           Network Devt. & MARC Standards Office                                                           October 1997The Application/MARC Content-typeStatus of this Memo   This memo provides information for the Internet community.  It does   not specify an Internet standard of any kind.  Distribution of this   memo is unlimited.Copyright Notice   Copyright (C) The Internet Society (1997).  All Rights Reserved.Abstract   This memorandum provides a mechanism for representing objects which   are files of Machine-Readable Cataloging records (MARC).  The MARC   formats are standards for the representation and communication of   bibliographic and related information.  A MARC record contains   metadata for an information resource following MARC format   specifications.1.  Introduction   The MARC formats are sets of codes and content designators defined   for encoding metadata for five types of data: bibliographic,   holdings, authority, classification, and community information.  The   structure of MARC records is an implementation of national and   international standards, ANSI Z39.2 (Information Interchange Format)   and ISO 2709 (Format for Information Interchange).  Codes and   conventions in the formats identify and characterize data elements   within a record and support the manipulation of those data.   MARC formats are communication formats, primarily designed to provide   specification for the exchange of bibliographic and related   information between systems.  They are widely used in a variety of   exchange and processing environments.  They do not mandate internal   storage or display formats to be used by different systems.Guenther                     Informational                      [Page 1]

RFC 2220             Application/MARC Content-type          October 19972.  Definition   Since there are different flavors of MARC which would be processed by   different applications, this content-type/subtype refers to the   harmonized USMARC/CANMARC specification.  Additional content-   types/subtypes may be defined in the future (e.g.   application/unimarc).   MARC records involve three elements: the record structure, content   designation, and data content.  Only those records that contain all   three elements according to the standard would use this content-   type/subtype, i.e. content extracted from the structure would not.   Since MARC does not mandate an internal storage format, parameters   have not been assigned to specific implementations (e.g. OCLC-MARC,   LC-MARC, etc.).  In addition, parameters have not been defined for   the specific type of MARC format (e.g. bibliographic, authority,   holdings), since the information is contained in the Leader portion   of the record.3. Registration Information   To: ietf-types@iana.org   Media type name: application   Media subtype name: marc   Required parameters: None   Optional parameters: None   Encoding considerations:  MARC records may contain long lines and/or   arbitrary octet values.  The base64 content-transfer-encoding is   recommended for transmission of MARC over electronic mail.4.  Security Considerations   There are no known security risks associated with the use or viewing   of MARC data.  A MARC record may have security classification   associated with the document it describes or metadata in that record.   Although this does not present any security risk to the user of MARC   data, it may provide an opportunity for a security breach for the   source of classified MARC data.Guenther                     Informational                      [Page 2]

RFC 2220             Application/MARC Content-type          October 19975.  Interoperability Considerations   MARC is a communication format and is designed for interoperability   between different systems that may store data in local formats   internally.6.  Published Specification   "USMARC Format for Bibliographic Data"; "USMARC Format for Authority   Data"; "USMARC Format for Holdings Data"; "USMARC Format for   Classification Data"; "USMARC Format for Community Information".   Additional information:      File extension: .mrc      OID: 1.2.840.10003.5.10   Person & email address to contact for further information:      Network Development & MARC Standards Office <ndmso@loc.gov>      101 Independence Ave. SE      Library of Congress      Washington, DC 20540-4102 U.S.A.7.  References   Library of Congress, Network Development and MARC Standards   Office, "USMARC Format for Bibliographic Data", 1994-  .   "USMARC Format for Authority Data", 1993-  .   "USMARC Format for Holdings Data", 1989-  .   "USMARC Format for Classification Data", 1991-  .   "USMARC Format for Community Information", 1993-  .8.  Author's Address   Rebecca Guenther   Network Development & MARC Standards Office   Library of Congress   101 Independence Ave. SE   Washington, DC 20540-4102 U.S.A.   Phone: +1 (202) 707-5092   FAX: +1 (202) 707-0115   EMail: rgue@loc.govGuenther                     Informational                      [Page 3]

RFC 2220             Application/MARC Content-type          October 19979.  Full Copyright Statement   Copyright (C) The Internet Society (1997).  All Rights Reserved.   This document and translations of it may be copied and furnished to   others, and derivative works that comment on or otherwise explain it   or assist in its implmentation may be prepared, copied, published   andand distributed, in whole or in part, without restriction of any   kind, provided that the above copyright notice and this paragraph are   included on all such copies and derivative works.  However, this   document itself may not be modified in any way, such as by removing   the copyright notice or references to the Internet Society or other   Internet organizations, except as needed for the purpose of   developing Internet standards in which case the procedures for   copyrights defined in the Internet Standards process must be   followed, or as required to translate it into languages other than   English.   The limited permissions granted above are perpetual and will not be   revoked by the Internet Society or its successors or assigns.   This document and the information contained herein is provided on an   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."Guenther                     Informational                      [Page 4]