Note: This report was originally published in D-Lib Magazine, July/August 1996, by Stuart Weibel (OCLC) and Lorcan Dempsey (UKOLN).
Original publication: https://www.dlib.org/dlib/july96/07weibel.html

The Warwick Metadata Workshop: A Framework for the Deployment of Resource Description

Stuart Weibel, OCLC Office of Research; Lorcan Dempsey, UKOLN, University of Bath

Background

The OCLC/UKOLN Warwick Metadata Workshop convened in the first week of April 1996 at Warwick University, UK. Approximately fifty representatives of the library, Internet standards, text markup, and digital library communities from three continents and eleven countries gathered to address impediments to deploying metadata for networked information resources.

The workshop built upon the 1995 OCLC/NCSA Metadata Workshop, which had established a core set of thirteen elements for describing networked resources — the Dublin Core.

Challenges Addressed

Four major challenge areas were identified:

1. Specification of a transfer syntax for Dublin Core
2. Development of user guides for metadata creation
3. Identification of extensibility mechanisms
4. A framework to accommodate diverse metadata varieties

Dublin Core Specifications

The workshop produced a concrete SGML DTD syntax for Dublin Core expression and an HTML mapping convention using META tags to embed author-generated metadata in web documents. The convention used the NAME attribute to identify metadata elements and the CONTENT attribute for their values, with a prefix scheme for element grouping.

A proposed use of LINK elements for external metadata references was also developed, and a convention for schema element grouping via prefix identifiers was established.

The Warwick Framework

The most significant deliverable was a container architecture for aggregating metadata objects for interchange — the Warwick Framework. Described by Carl Lagoze, Clifford Lynch, and Ron Daniel, this modular, extensible system provided:

• Support for multiple metadata types and models
• Distributed metadata references
• Recursive metadata structures
• Typed packages: primitive (directly embeddable metadata), indirect (references to external metadata), or container (nested packages)

The Warwick Framework recognized that resource description on the Internet must accommodate the requirements of many communities, not just one dominant standard. Its contribution was architectural — providing a principled way to associate multiple metadata vocabularies with a single resource.

Metadata Creation Guides

A working group led by John Kunze, Priscilla Caplan, Bernal Rajapatarana, Frank Roos, and Tom Baker was established to develop guidelines addressing authors, collection administrators, and third-party catalogers. The guides were intended to lower the barrier to metadata creation by providing practical, domain-specific advice.

The Dublin Core Elements

The workshop reaffirmed the Dublin Core as a set of elements covering: Subject, Title, Author, Publisher, Other Agent, Date, Object Type, Form, Identifier, Relation, Source, Language, and Coverage. All elements remained optional, repeatable, and modifiable through qualifiers.

Early Pilot Projects

Several pilot projects demonstrated the viability of the Dublin Core approach:

• Nordic Metadata Project (Juha Hakala, Helsinki University Library) — facilitating inter-library loan services across Scandinavia using Dublin Core metadata
• TURNIP (Uniform Resource Name Interoperability Project, DSTC Australia) — URN resolution with Dublin Core metadata
• OCLC Research Initiatives — including Spectrum (user-based description) and Scorpion (automatic subject assignment using WordNet)
• NDIS (National Document and Information Service) — joint National Library of Australia/New Zealand project
• Alexandria Digital Library — NSF/NASA/ARPA-funded spatial data access project at UC Santa Barbara
• ROADS (Resource Organisation and Discovery in Subject-based Services) — eLib-funded project using IAFA/whois++ templates

Significance

Conferees left Warwick convinced that significant progress had been made. The rapid production of workshop documents and the emergence of implementations validated the workshop's conclusions. The Warwick Framework in particular represented a conceptual advance — moving beyond the question of which metadata standard would prevail to a recognition that multiple standards must coexist within a common architecture.

Supporting Organizations

• UKOLN (UK Office for Library and Information Networking)
• OCLC (Online Computer Library Center)
• JISC (Joint Information Systems Committee, UK)
• Corporation for National Research Initiatives (CNRI)
• ERCIM (European Research Consortium for Informatics and Mathematics)