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Top > Making and Providing Bibliographic Data > Classification / Subject Headings

Cataloging Tools and Resources

Classification / Subject Headings

This page explains the National Diet Library Classification (NDLC), the Nippon Decimal Classification (NDC) 9th Revised Edition Applicable Criteria, and the National Diet Library List of Subject Headings (NDLSH).

National Diet Library Classification (NDLC)

The National Diet Library Classification (NDLC) is a system of classification developed and maintained by the NDL for the efficient management of library collections.

Nippon Decimal Classification (NDC) 9th Revised Edition Applicable Criteria

The Nippon Decimal Classification (NDC) 9th Revised Edition Applicable Criteria offers basic policies for classification of works according to the NDC as well as an interpretation of the NDC classification system at the NDL.

National Diet Library List of Subject Headings (NDLSH)

The National Diet Library List of Subject Headings (NDLSH) is a controlled subject vocabulary list compiled and maintained by the NDL as a subject access tool. It is used to search the NDL catalog by subject heading. The NDLSH was published in book form from 1964 to 1991. Revisions of the NDLSH have been available in PDF format from the NDL website since 2005.
In 2010, the NDL launched Web NDLSH, a version of the NDLSH optimized for the Web. In 2011, Web NDLSH was expanded to provide name authority data and subject authority data on a single interface. The NDL now offers Web NDL Authorities on its website.

NDLSH data are available on Web NDL Authorities. Web NDL Authorities also allows users to download the list of NDLSH in RDF/XML or TSV.

Web NDL Authorities provides RSS feeds of new and revised subject headings.

For more information about this service, please refer to "About Web NDL Authorities."

National Diet Library Subject Cataloging Manual

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