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Top > About Us > Electronic Library Projects > Standards for Digital Information > Use and Connect: How to use NDL LOD

Use and Connect: How to use NDL LOD

The National Diet Library (NDL) provides metadata as Linked Open Data (LOD) to facilitate effective use by computer systems or applications. This page provides the use of specific data. Please refer to Use and Connect: What is NDL Linked Open Data (LOD)? for general information or Use and Connect: How to link to NDL LOD for usage examples. As for other open data, please refer to Free Data Service.

1. Bibliographic Data (NDL Search)

Data download

The NDL Search provides an API (SRU, SRW, OpenSearch, Z39.50 and OAI-PMH). For more details, please refer to Application Programming Interface (API).

Terms of use

People who wish to use API of the NDL Search for a commercial activity are requested to apply for a license. Also, people who require continuous access to the API for a non-profit activity are requested to apply for a license. After reading how to use the API, please fill out the Application Programming Interface (API) of the NDL Search: Application Form and send it online to the NDL.

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2. Authority data (Web NDL Authorities)

Data download

Terms of use

Web NDL Authorities may be used for non-profit activities without a license as long as Web NDL Authorities is cited as the source.
Applications for a license to use Web NDL Authorities for commercial activities must be examined individually. Please read the Terms of use carefully, fill out the inquiry form and select the category "About authority data and Web NDL Authorities" to contact us.

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3. Data related to earthquakes (the NDL Great East Japan Earthquake Archive (code name "HINAGIKU"))

Data download

HINAGIKU provides API via SRU, OpenSearch, and OAI-PMH. Please refer to Application Programming Interface (API) for more details.

Terms of use

The HINAGIKU API can be used for non-profit activities without a license as long as the HINAGIKU API is cited as the source. Applications for a license to use the HINAGIKU API for commercial activities must be examined individually. Please read About-API use application, then fill out all required items of the "Entry of use application" and send it online to the email address shown in Inquiries.

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Contact for inquiries about NDL's Linked Open Data

Standardization Section, Digital Information Distribution Division,
Digital Information Department, National Diet Library
E-mail: standardizationat n d l dot g o dot j p

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