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226 of 226 standards

Access to Biological Collection Data

(ABCD)

An XML schema for exchanging specimen and observation data from biological collections.

Element Set / Metadata Schema active Biodiversity Information Standards (TDWG) Updated June 13, 2007

ACM Computing Classification System

(CCS)

A poly-hierarchical classification system for categorizing computing research literature.

Encoding Scheme / Value Vocabulary active Association for Computing Machinery Est. 1964

Activity Streams 2.0

(AS2)

A JSON-LD vocabulary for representing social activities, powering ActivityPub and the fediverse.

Conceptual Data Model / Framework active World Wide Web Consortium Updated May 23, 2017

ActivityPub

A W3C protocol for decentralized social networking, enabling server-to-server federation across the fediverse.

Technical Specification active World Wide Web Consortium Updated January 23, 2018

AGROVOC

Over 42,000 concepts spanning agriculture, fisheries, and food science in more than 42 languages.

Vocabulary / Thesaurus active Food and Agriculture Organization of the United Nations Est. 1980

Analyzed Layout and Text Object

(ALTO)

Encodes the physical layout and recognized text of digitized document pages from OCR output.

Element Set / Metadata Schema active Library of Congress Est. 2004

Anglo-American Cataloguing Rules, Second Edition

(AACR2)

The cataloguing rulebook that defined how English-speaking libraries described their collections.

Element Set / Metadata Schema historical American Library Association / Canadian Library Association / CILIP Est. 1978

ANSI/NISO Z39.105-2023, Content Profile/Linked Document

(CP/LD)

Transforms scholarly content into self-describing, machine-actionable linked documents using HTML and JSON-LD.

Technical Specification active National Information Standards Organization Updated December 12, 2023

Archival Resource Key

(ARK)

A persistent identifier scheme for long-term access to information objects managed by memory institutions.

Encoding Scheme / Value Vocabulary active ARK Alliance Est. 2001

Art & Architecture Thesaurus

(AAT)

A multilingual thesaurus of over 55,000 concepts for art, architecture, and material culture.

Vocabulary / Thesaurus active Getty Research Institute Updated January 25, 2021

Asset Description Metadata Schema

(ADMS)

Describes reusable interoperability assets like schemas, code lists, and data models across borders.

Application Profile active European Commission / SEMIC Updated February 1, 2024

Astronomy Visualization Metadata

(AVM)

Embeds sky coordinates, observation details, and taxonomy directly into astronomical outreach images.

Element Set / Metadata Schema active Virtual Astronomy Multimedia Project Updated May 13, 2011

Atom Syndication Format

(Atom)

An XML-based web syndication format for publishing and consuming feeds of entries such as blog posts and news.

Exchange Format active IETF Updated December 1, 2005

AudioMD: Audio Technical Metadata Extension Schema

(AudioMD)

An XML schema for recording technical metadata about audio digital objects in preservation systems.

Element Set / Metadata Schema active Library of Congress Est. 2005

Audiovisual Core Multimedia Resources Metadata Schema

(AC)

Metadata vocabularies for describing biodiversity-related multimedia resources and collections.

Element Set / Metadata Schema active Biodiversity Information Standards (TDWG) Updated February 24, 2023

Australian Government Locator Service

(AGLS)

A Dublin Core profile that mandated metadata for Australian government services and information.

Application Profile historical National Archives of Australia Updated June 28, 2010

BagIt File Packaging Format

(BagIt)

A file packaging convention using manifests and checksums for reliable digital content transfer.

Technical Specification active Library of Congress / California Digital Library Updated October 1, 2018

BBC Ontologies

Fourteen interlinked RDF ontologies powering linked data across BBC Sport, News, Music, and more.

Ontology active BBC Est. 2012

BIBFRAME (Bibliographic Framework Initiative)

(BIBFRAME)

A linked data vocabulary built around Work, Instance, and Item to replace MARC for library data.

Element Set / Metadata Schema active Library of Congress Updated February 25, 2026

Bibliographic Ontology

(BIBO)

An OWL ontology for modeling citations, documents, and scholarly references on the Semantic Web.

Ontology active Dublin Core Metadata Initiative Updated November 4, 2009

Bibliographic Reference Ontology

(BiRO)

An OWL ontology for describing bibliographic references and their ordered collections within citing works.

Ontology active SPAR Ontologies Est. 2011

Bioschemas

Extends Schema.org with usage profiles for genes, proteins, datasets, and other life science resources.

Application Profile active Bioschemas Community Est. 2015

Book Interchange Tag Suite

(BITS)

An XML tag suite extending JATS to encode the full text and metadata of scientific books.

Technical Specification active National Center for Biotechnology Information / National Library of Medicine Est. 2012

C2PA Content Credentials

(C2PA)

Tamper-evident content credentials that certify the provenance and edit history of digital media.

Technical Specification active Coalition for Content Provenance and Authenticity Updated October 1, 2024

Cataloging Cultural Objects

(CCO)

Rules and best practices for creating consistent, sharable descriptions of cultural works and images.

Element Set / Metadata Schema active Visual Resources Association Est. 2006