Metadata Object Description Schema
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The Object Description Schema (MODS) is an XML-based bibliographic description schema developed by the United States Library of Congress' Network Development and Standards Office. MODS was designed as a compromise between the complexity of the MARC format used by libraries and the extreme simplicity of Dublin Core metadata.
History and development
MODS was first announced for trial use in June, 2002. As of August 2010 it is at version 3.4.
The number of users of MODS is unknown. Implementers are encouraged to register their uses of MODS in the implementation registry on the official MODS website. To date there are about 30 projects listed in the registry, although it is assumed that many others are making use of the standard. Users are primarily operating in the area of digital libraries, and some of the registered uses are in digital library projects at the Library of Congress.
Revisions to the schema are suggested and discussed on the MODS listserv, and approved by the MODS Editorial Committee, an international maintenance board. The Library of Congress carries out the application of approved changes to the schema and maintains the official web site for the standard. There is no formal standards body involved in the MODS schema at this time.
Relationship to MARC
The MODS record has been designed to carry key data elements from the MARC record but does not define all of the MARC fields and does not use the field and subfield tagging from the MARC standard. There are data elements in MODS that are not compatible with the MARC record so there is some loss translating from MARC to MODS and from MODS to MARC. There is no commitment on the part of the Library of Congress to maintain compatibility between the two metadata formats beyond what is convenient to the community of MODS users.
See also
- Comparison of reference management software for software supporting the MODS format.
- Metadata Authority Description Schema was created to serve as a companion to the Metadata Object Description Schema (MODS).[1]
- Metadata standards