ONIX to MARC 21 Mapping

Network Development and MARC Standards Office
Library of Congress
Table of Contents
Introduction
Mapping
MARC 21 Record Builder
ONIX to MARCXML Stylesheet
The following is a mapping between the data elements contained in theONIX International standard and data elements in the MARC 21 Format for Bibliographic Data. The ONIX International standard is intended to provide publishers with a means to share product and supplier information usable on the Internet. It is developed and maintained by EDItEUR, jointly with the Association of American Publishers, Book Industry Communication and Book Industry Study Group. ONIX Release 2.1 was made available in June 2003. It is this version that was used to establish the original mapping to MARC 21.
Mapping table: ONIX Release 2.1 to MARC 21 (September 2004)
Themapping table is presented in ONIX data element order. ONIX data elements are listed by their short tags and reference names. MARC 21 data elements are identified by the field tag, position, indicator position, and/or subfield code, whichever is appropriate. When a blank (hex '20') is the appropriate MARC 21 fixed-length data element or indicator value, it is indicated by "#" in this document. MARC fixed-length positions are preceded by a slash ("/"); Subfield codes are preceded by a dollar sign ("$"). ONIX "composite" tags have not been mapped, but may have notes. Data elements that did not map well are not yet specified. They may be added at a later date.
Record Builder: ONIX Release 1.2 to MARC 21 (December 2000)
Therecord builder is used to create as full of a MARC record that can be created from the ONIX data. This builder was originally created by Bob Pearson ofOCLC.
The mappings shown in this table are proposed and somewhat loose. The mapping does not provide all the information that would be needed to do an actual conversion of ONIX data to MARC 21. In some cases, interpretation and special processing would be required of the content of an ONIX data element to render data compatible with the content of the corresponding MARC 21 data element. Often a choice between more than one potential MARC 21 data element is required. The processing required would involve the conversion of codes from tables associated with ONIX data elements and other analyses of the content of ONIX elements prior to generation of the appropriate MARC 21 data element. For the most part, supplier and sales data elements in ONIX have no equivalents in MARC 21, but these could be mapped to locally-defined MARC elements if needed.
ONIX tag ONIX Reference Name MARC 21 Data Element / Comments
Header composite

End of Header composite
Main Series Record
A Main Series Record describes a series or "top level" of a series or subseries.
001
LDR/17
LDR/05 d
500


040 $a

Main series identifiers
The Main Series Identifiers provides a unique identifier for the series by which it can be linked to subseries and/or products.
Series identifier composite
  022 $a
End of Series identifier composite
Main series title
The Main Series Title includes the title composite which gives the text of a title.
Title composite