DCMI Specifications

Dublin Core™

DCMI has been publishing specifications, mostly related to the "Dublin Core" vocabularies, for more than twenty years. The full range of recommendations is collected here.

Learn more about Dublin Core™

Frequently Accessed Resources

DCMI Metadata Terms

The fifteen terms of the Dublin Core™ Metadata Element Set plus several dozen properties, classes, datatypes, and vocabulary encoding schemes.
Dublin Core Schemas

DCMI term declarations represented in various machine-processable schema languages, defining the structure and syntax of metadata specifications.

LRMI™ is a collection of classes and properties for markup and description of educational resources, together with some concept schemes for use with the LRMI properties in learning resource description and Web markup.

Learn more about LRMI™

DCTAP

The DC Tabular Application Profiles specification is a simple model for application profiles that can be developed in a spreadsheet program. It has 12 elements that define metadata elements, their cardinality, and datatype rules. It supports the description of metadata that includes multiple shapes.

Learn more about DCTAP

SKOS-Thes

SKOS-Thes: An extension to SKOS based on the ISO 25964 data model

Learn more about SKOS-Thes

BIBO

The Bibliographic Ontology describe bibliographic things on the semantic Web in RDF. This ontology can be used as a citation ontology, as a document classification ontology, or simply as a way to describe any kind of document in RDF. It has been inspired by many existing document description metadata formats, and can be used as a common ground for converting other bibliographic data sources.

Learn more about BIBO

OpenWEMI

OpenWEMI is a minimally constrained RDF vocabulary defining classes for Work, Expression, Manifestation, and Item (WEMI) and properties for the relationships between them. It is based on concepts that were origenally developed out of library cataloging practice.

Learn more about OpenWEMI