Conceptual Data Model / Framework
An abstract model not tied to a specific serialization (e.g. FRBR, CIDOC-CRM)
14 standards
Activity Streams 2.0
(AS2)A JSON-LD vocabulary for representing social activities, powering ActivityPub and the fediverse.

CIDOC Conceptual Reference Model
(CIDOC-CRM)An ISO-standard ontology for integrating cultural heritage data across museums, libraries, and archives.

Common European Research Information Format
(CERIF)Models the entities of scientific research for interchange between research information systems.

DCMI Abstract Model
(DCAM)Defines the underlying information structures for all Dublin Core metadata descriptions.
Functional Requirements for Bibliographic Records
(FRBR)Introduced the Work-Expression-Manifestation-Item model that reshaped bibliographic cataloging.
IFLA Library Reference Model
(IFLA LRM)A conceptual model unifying bibliographic entities like works, expressions, and manifestations.
indecs Framework
(indecs)A foundational metadata framework for interoperability in digital content commerce and rights.
Industry Foundation Classes
(IFC)An open data schema for exchanging building and construction models across platforms.

Nanopublication
Packages a single scientific claim with its provenance and metadata as citable RDF named graphs.

Open Archival Information System
(OAIS)A reference model defining the functions and information flows needed for long-term digital preservation.

Portland Common Data Model
(PCDM)A flexible linked data model for representing digital collections in repository systems like Fedora and Samvera.

Records in Contexts
(RiC)Connects archival records with people, places, and events through a unified conceptual model.

Verifiable Credentials Data Model
(VC)A data model for issuing tamper-evident digital credentials that holders can present and verifiers can trust.
Web Annotation Data Model
A structured model for attaching comments, tags, and other content to specific parts of web resources.