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Join us for this 30-minute webinar that continues the conversation about linked data and what it can do for your library. We\'ll discuss how linked data will help libraries connect and scale knowledge, fuel discovery, and contribute to the global information ecosystem.

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Je kunt op elk moment real-time updates over de beschikbaarheid van onze diensten raadplegen via ons systeemstatusdashboard (zie voorbeeldscherm hieronder). Bibliotheekmedewerkers kunnen zich ook aanmelden om via e-mail op de hoogte te blijven van de status van individuele diensten. Ervaar je problemen met één van onze diensten? Neem dan contact op met OCLC Support. Werk je bij een bibliotheek die Wise gebruikt? Dan kan de organisatie bij wie je Wise afneemt je meer vertellen over het dashboard voor jouw bibliotheeksysteem.

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欢迎来到 OCLC！ 如果您要从图书馆寻找信息或资料，请访问 visit WorldCat.org，在您附近的图书馆和世界各地的数千家图书馆中搜索资源。

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欢迎来到 OCLC！ 如果您要从图书馆寻找信息或资料，请访问 visit WorldCat.org，在您附近的图书馆和世界各地的数千家图书馆中搜索资源。

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Welkom bij OCLC! Als u informatie of materiaal van bibliotheken zoekt, ga dan naar WorldCat.org om te zoeken naar bronnenmateriaal in een bibliotheek bij u in de buurt en in duizenden bibliotheken in de wereld. Om te zoeken in de Nederlandse centrale catalogus kunt u PiCarta.on.WorldCat.org gebruiken.

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Welkom bij OCLC! Als u informatie of materiaal van bibliotheken zoekt, ga dan naar WorldCat.org om te zoeken naar bronnenmateriaal in een bibliotheek bij u in de buurt en in duizenden bibliotheken in de wereld. Om te zoeken in de Nederlandse centrale catalogus kunt u PiCarta.on.WorldCat.org gebruiken.

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Create, curate, and connect linked data entities to improve metadata visibility

Photo illustration: OCLC Meridian interface and linked data code
Photo illustration: OCLC Meridian interface and linked data code

OCLC Meridian® is an intuitive web application and set of APIs that allows libraries to create, curate, and connect linked data entities. Enrich your metadata by creating connections to existing values in MARC records and other datasets across the global information ecosystem.

Start creating linked data todayNew to linked data? Explore our resources

Live webinar: Using linked data to enhance discovery experiences

Wed, May 14, 2025 - 2:30pm EDT

Join us for this 30-minute webinar that continues the conversation about linked data and what it can do for your library. We'll discuss how linked data will help libraries connect and scale knowledge, fuel discovery, and contribute to the global information ecosystem.

Check it out
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Improve library discoverability and relevance for users

Create WorldCat Entities™ linked data using Meridian to improve your library’s discovery, findability, and relevance across the web by integrating metadata where users search for information. Because WorldCat Entities data can be accessed in new ways by libraries, partners, and services across the web, important resources and knowledge collections are visible and useful in more online environments.

Photo illustation: WorldCat Entities interface
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Integrate linked data management into your existing workflows

With Meridian, you don’t need to go “all in” at once. You can contribute in ways that make sense for your library or organization, without disruption to current workflows. Use the web application to create, curate, and connect WorldCat Entities data one at a time, or use the suite of APIs to easily convert and leverage existing metadata at scale.

Discover, emphasize, and analyze important relationships

A suite of WorldCat Entities APIs enables users to connect identifiers from disparate sources (such as ORCID, ISNI, VIAF, etc.), learn of changes to WorldCat Entities data, and retrieve subsets of related data from WorldCat Entities and WorldCat for use in local discovery applications.

Photo illustation: Data from a WorldCat Entities file

Contribute to a scalable, sustainable network of linked data

Create linked data entities that can improve research, analysis, and discovery across diverse types of data.

Connect to any other library or nonlibrary dataset supported by linked data technology.

Integrate with existing MARC records and other datasets, systems, and services.

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150+millionWorldCat Entities

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400+millionWorldCat Entities URIs added to WorldCat MARC records

“Evolving library data into linked data frees the knowledge in library collections and connects it to the knowledge streams that inform our everyday lives—on the web, through smart devices, and using technologies like AI.”

Jeff Mixter
Senior Product Manager, Metadata and Digital Services, OCLC

Read Jeff’s blog post, “An introduction to linked data”

Photo: Jeff Mixter

Easily convert and leverage your existing metadata at scale with APIs

Developers can take advantage of a suite of WorldCat Entities APIs that provides different levels of programmatic access. APIs are backed by the latest privacy, security, and compliance standards—visit our Trust Center to learn how OCLC keeps your data safe.

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Entity Management API

Included

Create and curate WorldCat Entities linked data

Icon: Entity Search API

Entity Search API

Included

Search for identifiers that match existing descriptive metadata

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Entity Changes API

Included

Learn when there are changes to WorldCat Entities data

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PID Lookup API

Included

Connect persistent identifiers (PID) from multiple vocabularies

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Entity Connections API

Add-on

Retrieve subsets of related data for use in local discovery applications

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Entity Query API

Add-on

Query the entire WorldCat Entities dataset

Explore API resources and documentation

Learn about OCLC’s linked data strategy

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Linked data as the next evolution of library metadata

OCLC recognizes metadata and metadata expertise is more important than ever for the sharing of knowledge. Learn about our long-term strategy focusing on expertise, data, infrastructure, and tools.

Learn more

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The future of library cataloging

OCLC’s position paper on linked data explores why good metadata is more important than ever, breaking up information locked in MARC records and creating new connections.

See how it works

OCLC Next blog: Making an impact online

Making an impact online

The shift toward linked data isn’t just a technology upgrade, but a long-term strategy for enhancing the findability and accessibility of library resources.

Read the Next blog post

Why choose Meridian?
Meridian is a fundamental step forward in making linked data a reality for libraries.

  • Integrate with MARC-based catalogs and other datasets within existing workflows
  • Connect identifiers across disparate vocabularies and authorities like ORCID and VIAF
  • Available globally as a stand-alone service or as an addition to your OCLC cataloging subscription
  • Collaborate with a growing network of metadata professionals in the OCLC Community Center

Join the metadata evolution with Meridian

Start creating WorldCat Entities, descriptions, and connections today, and begin the transition to linked data at your pace. Wherever you are in your linked data journey, we’d like to hear from you.

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