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Network Working Group R. Guenther
Request for Comments: 2220 Library of Congress
Category: Informational Network Devt. & MARC Standards Office
October 1997


The Application/MARC Content-type

Status 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.








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2. 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.








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5. 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
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.gov





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9. 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."
























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