Dublin Core Metadata Initiative (DCMI): Organization dedicated to promoting the widespread adoption of interoperable metadata standards and developing specialized metadata vocabularies for describing resources that enable more intelligent information discovery systems

Encoded Archival Description (EAD) Official Web Site: "The official Web site for the Encoded Archival Description DTD, a SGML application for archival finding aids. The DTD was developed by the archival community and is maintained by the Library of Congress. The Web page provides links to EAD documents and implementors.

MARC Standards: Library of Congress Network Development and MARC Standards Office. Includes: general information, MARC documentation, MARC Advisory Committee, MARC SGML, records and systems, and software and utilities

Metadata: Mapping between metadata formats.: Michael Day. UK Office for Library and Information Networking. GILS, Dublin Core, MARC, EAD, Z39.50, TEI, and FGDC

Resource Description Framework: Official pages from the World Wide Web Consortium, includes the specification, resources, news, and a links collection

Text Encoding Initiative: "The Text Encoding Initiative (TEI) is an international project to develop guidelines for the preparation and interchange of electronic texts for scholarly research, and to satisfy a broad range of uses by the language industries more generally.