OCLC Meridian makes it possible for libraries to create linked data that connect resources to the wider web

New web application and set of APIs help libraries benefit from and contribute to a scalable, sustainable network of authority linked data

image: Meridian service preview

DUBLIN, Ohio, 9 May 2024—Introducing OCLC Meridian, a web application and set of APIs that libraries and other organizations that manage metadata for knowledge collections can use to create, curate, and connect linked data entities. Published in WorldCat Entities, this linked data is then available for use across a wide variety of services, systems, and data sets to connect to other knowledge streams where people search for information.

Meridian enables the creation of linked data entities and descriptive relationships from within libraries' current workflows, forming connections to existing bibliographic records and other datasets in the global information ecosystem. Through these connections, WorldCat Entities data improves library discovery, findability, and relevance across the web.

This new service allows libraries and other organizations managing metadata to contribute to a shared linked data infrastructure. Libraries can contribute at their own pace and without disruptions to their current workflows.

"The launch of Meridian represents a fundamental step forward in the transition from MARC-based cataloging to linked data services," said Mary Sauer-Games, OCLC Vice President, Global Product Management. "Libraries of all types and sizes can benefit from and contribute to a scalable, sustainable network of authority linked data. The Meridian application and APIs will provide libraries with the tools they need to see for themselves how linked data can improve library discoverability and relevance for users."

With Meridian comes a suite of APIs that enables users to create and curate linked data at scale; find identifiers from different library sources (such as VIAF, ISNI, ORCID, ROR, etc.) as well as identifiers in general purpose knowledge graphs (such as Wikidata, or MusicBrainz); learn of changes to WorldCat Entities data; and retrieve subsets of pre-scripted linked data relationships for use in local discovery applications.

The release of Meridian is a key milestone in OCLC's long-term linked data strategy. 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 artificial intelligence (AI). Linked data facilitates greater contextualization of information, makes resources more discoverable, provides opportunities to improve workflows, and supports easier integration of library data into other systems and services.

Meridian is available globally as a standalone subscription or as a complement to a cataloging subscription, providing libraries of all types and sizes the opportunity to benefit from and contribute to a scalable, sustainable network of authority linked data through WorldCat Entities.

About OCLC

OCLC is a nonprofit global library organization that provides shared technology services, original research and community programs so that libraries can better fuel learning, research and innovation. Through OCLC, member libraries cooperatively produce and maintain WorldCat, the most comprehensive global network of data about library collections and services. Libraries gain efficiencies through OCLC’s WorldShare, a complete set of library management applications and services built on an open, cloud-based platform. It is through collaboration and sharing of the world’s collected knowledge that libraries can help people find answers they need to solve problems. Together as OCLC, member libraries, staff and partners make breakthroughs possible.

OCLC, WorldCat, WorldShare, and Meridian are trademarks and/or service marks of OCLC, Inc. Third-party product, service and business names are trademarks and/or service marks of their respective owners.


  • Bob Murphy

    Manager, Media Relations

    O: +1-614-761-5136

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