This is a translation of the article of the same title in
the NDL Monthly Bulletin No. 558 (September 2007).

The NDL has been constructing digital archives based on the Digital Library Medium Term Plan for 2004. Now we have formulated two standards, namely, “metadata for preservation” and “metadata for exchange,” and opened them to the public on the NDL web page.

In the field of metadata for preservation, we have released the NDL Digital Archiving System Metadata Schemas, which are to be used for the long-term preservation of digital information. The NDL Digital Archiving System has been developed as a system which handles integrally a wide variety of digital information such as Internet information and digitized contents of materials possessed by the NDL, and insures the long-term preservation and their availability.

In metadata for exchange, we have released NDL Dublin Core Metadata Element Set (DC-NDL). This is a revised version of the NDL Metadata Element Set (NDL Metadata) drawn up in March of 2001, which was intended as a metadata standard applicable to the online digital information. The DC-NDL is aimed to contribute to the interoperation of metadata between libraries and related institutions in Japan.

Please visit the following page for details of the metadata standards (Japanese only).
○ NDL metadata standards
http://www.ndl.go.jp/jp/aboutus/ndl-da.html

To enhance the content of the preservation metadata, we call for comments for the NDL Digital Archiving System Metadata Schemas Guideline, which sets down the definitions and the usages of the elements of metadata, until the end of December of 2007. Please refer to the following page and contact us via the entry format (Japanese only).
○ About the NDL Digital Archiving System Metadata Schemas
http://www.ndl.go.jp/jp/aboutus/ndl-da.html

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