Similar to 国際十進分類法

BIBSYS

JEL classification system

ORCID

ResearcherID

Scopus

Système universitaire de documentation

Library of Congress Control Number

Library of Congress Classification

International Standard Name Identifier

Colon classification

Sibu classification

Knowledge organization

Dewey Decimal Classification

Integrated Authority File

Nippon Decimal Classification

Faceted classification

National Library of Medicine classification

Metadata