- JPCOARスキーマ（XMLスキーマ定義）
https://github.com/JPCOAR/schema - COAR Vocabularies
https://www.coar-repositories.org/old-pages/activities/repository-interoperability/coar-vocabularies/ - DataCite
https://schema.datacite.org/ - Dublin Core Metadata Element Set, Version 1.1: Reference Description
http://dublincore.org/documents/dces/ - DCMI Metadata Terms
http://dublincore.org/documents/dcmi-terms/
[日訳] http://www.ndl.go.jp/jp/dlib/standards/translation/dcmi-terms.htm - OpenAIRE
https://guidelines.openaire.eu/en/latest/ - rioxx
http://rioxx.net/guidelines/ - 国立国会図書館ダブリンコアメタデータ記述（DC-NDL）
http://www.ndl.go.jp/jp/dlib/standards/meta/index.html
