Skip to main content

Libraries & Library Science

109 standards in this subject area

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

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

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

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

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

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

Categories for the Description of Works of Art

(CDWA)

A framework of 540 categories for describing works of art, architecture, and material culture.

Element Set / Metadata Schema active J. Paul Getty Trust Updated October 21, 2024

CIDOC Conceptual Reference Model

(CIDOC-CRM)

An ISO-standard ontology for integrating cultural heritage data across museums, libraries, and archives.

Conceptual Data Model / Framework active CIDOC CRM Special Interest Group (ICOM-CIDOC) Updated June 1, 2024

Citation Style Language

(CSL)

An open XML-based language for defining citation and bibliography formatting rules used by reference managers worldwide.

Technical Specification active CSL Community Updated October 1, 2015

Citation Typing Ontology

(CiTO)

An ontology that captures the rhetorical and factual reasons one publication cites another.

Ontology active SPAR Ontologies Updated February 16, 2018

Contextual Query Language

(CQL)

A human-readable query language for information retrieval systems, used with SRU and library search protocols.

Technical Specification active Library of Congress Est. 2004

Contributor Roles Taxonomy

(CRediT)

A taxonomy of fourteen roles capturing how each contributor participated in scholarly research.

Vocabulary / Thesaurus active NISO Est. 2014

copyrightMD

An XML schema for encoding copyright status and rights information within digital library objects.

Element Set / Metadata Schema active California Digital Library Updated November 14, 2025

COUNTER Code of Practice

(COUNTER)

The international standard for measuring and comparing usage statistics of electronic resources.

Technical Specification active COUNTER Updated January 1, 2025

Crossref Metadata Schema

The XML schema publishers use to register DOIs and deposit bibliographic metadata with Crossref.

Element Set / Metadata Schema active Crossref Est. 2000

DataCite Metadata Schema

Core metadata properties for identifying and citing research datasets registered with DOIs.

Element Set / Metadata Schema active DataCite Updated March 3, 2026

DC Tabular Application Profiles

(DC TAP)

Lets metadata designers define application profiles as simple CSV tables with shapes and constraints.

Technical Specification draft Dublin Core Metadata Initiative Updated April 23, 2021

DCMI Abstract Model

(DCAM)

Defines the underlying information structures for all Dublin Core metadata descriptions.

Conceptual Data Model / Framework active Dublin Core Metadata Initiative Updated June 4, 2007