RDA (Resource Description and Access)

RDA (Resource Description and Access)
Name	RDA (Resource Description and Access)
Released	2010
Author	Joint Steering Committee for Development of RDA
Country	International
Subject	Library and information science, bibliographic description

RDA (Resource Description and Access) is a standard for descriptive cataloguing used by libraries, archives, and cultural heritage institutions to create metadata for bibliographic resources. It provides guidelines and instructions for recording bibliographic, authority, and relationship data to support discovery and access in library catalogs, union catalogs, and digital repositories. RDA aims to be compatible with international bibliographic frameworks and machine-readable data environments.

Overview

RDA was produced to succeed legacy cataloguing codes and to align descriptive practice with conceptual models and linked data environments; it addresses entities such as works, expressions, manifestations, and items and prescribes elements for titles, statements of responsibility, edition, publication, physical description, series, notes, identifiers, and relationships. The standard is maintained and promoted by bodies that include the Joint Steering Committee for Development of RDA, national libraries such as the Library of Congress, the British Library, and organizations like the International Federation of Library Associations and Institutions and the National Library of Medicine. RDA’s publication and distribution involve publishers and consortia including ALA Publishing, the OCLC Research community, and national bibliographic agencies.

Development and History

RDA’s development drew on historical cataloguing codes such as the Anglo-American Cataloguing Rules and international initiatives like the Functional Requirements for Bibliographic Records and the FRBR model. Work on RDA accelerated in the early 2000s with contributions from working groups linked to institutions including the Library of Congress, the National Library of Australia, and the German National Library. Pilot projects and implementations by organizations such as OCLC, the British Library, and the Canadian Committee on Cataloguing informed revisions and national adoption decisions. Major milestones include the initial release in 2010, subsequent revisions influenced by committees like the RDA Steering Committee and the RDA Steering Committee Transition, and alignment projects with the International Federation of Library Associations and Institutions recommendations.

Principles and Content Model

RDA is grounded in conceptual frameworks including FRBR (Functional Requirements for Bibliographic Records), FRAD (Functional Requirements for Authority Data), and FRSAD (Functional Requirements for Subject Authority Data), which derive from work by organizations such as the International Federation of Library Associations and Institutions. The RDA content model defines entities (agents, works, expressions, manifestations, items), relationships (creator, contributor, publisher), and attributes (title, date, extent, carrier, carrier type) to support user tasks articulated in FRBR and related models. RDA emphasizes element-based data suitable for mapping to vocabularies and ontologies used by the Library of Congress Subject Headings, the Virtual International Authority File, and the Dewey Decimal Classification community. The standard also incorporates identifiers such as ISNI and ISBN and interoperates with registries and authorities like VIAF and ORCID.

Application and Implementation

Institutions implement RDA in integrated library systems, discovery layers, and metadata workflows developed by vendors and consortia such as Ex Libris, Innovative Interfaces, and WorldCat partners. National libraries including the Library of Congress, the National Library of New Zealand Te Puna Mātauranga, and the Bibliothèque nationale de France have created policy statements, training, and conversion projects to adopt RDA. Implementation often requires mapping from MARC formats, data cleanup, authority control using services like VIAF and ORCID, and coordination with digitization projects at institutions such as the British Library and the National Library of Australia. Interoperability efforts engage standards bodies like ISO and projects in linked data ecosystems involving the W3C.

Relationship to MARC and Other Standards

RDA was designed to be format-agnostic but has been implemented predominantly within the MARC 21 environment and legacy systems maintained by organizations such as the Library of Congress and OCLC. Harmonization efforts include mapping elements from RDA to MARC 21, to Dublin Core metadata elements used by repositories such as Europeana, and to ontologies suited to linked data like the BIBFRAME initiative promoted by the Library of Congress. Standards bodies including ISO committees and the International Federation of Library Associations and Institutions have engaged with RDA to align content with international descriptive practices and identifier systems such as ISBN and ISNI.

Criticisms and Revisions

Critiques of RDA have come from practitioners and scholars at institutions such as the British Library, the Library of Congress, and university library systems who have questioned complexity, training demands, and transitional costs. Debates have engaged professional groups including the American Library Association and national cataloguing committees over granularity, implementation timelines, and the adequacy of mappings to MARC 21 and linked data models like BIBFRAME. In response, RDA has undergone revisions and maintenance processes coordinated by governance bodies including the RDA Steering Committee and advisory groups, resulting in updates to guidance on relationships, identifier treatment, and instructions reflecting feedback from implementations at OCLC, the National Library of Medicine, and other stakeholders.

Impact on Cataloguing Practice

Adoption of RDA has influenced cataloguing workflows, authority control, and discovery systems across national libraries, consortia, and academic institutions such as the Library of Congress, the British Library, the National Library of Scotland, and major university libraries. RDA encourages structured, element-based metadata conducive to linked data, influencing projects by OCLC, the Digital Public Library of America, and aggregators like Europeana. Training, policy development, and vendor support have evolved in response, with cataloguers engaging with international initiatives and professional organizations including the American Library Association, the International Federation of Library Associations and Institutions, and national cataloguing committees to refine practice and interoperability.

Category:Library cataloguing standards