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Princeton University Cataloging Documentation

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What is metadata?

"...structured information that describes, explains, locates, or otherwise makes it easier to retrieve, use, or manage an information resource. Metadata is often called data about data or information about information." NISO. "Understanding Metadata." 2004.

Further reading

Metadata Basics (Library of Congress)
Understanding Metadata (NISO)
Introduction to Metadata: Pathways to Digital Information (Getty Research Institute)
Understanding Metadata and its Purpose (Karen Coyle)

Specific Metadata Standards

MAchine-Readable Cataloging (MARC)
Metadata Object Description Schema (MODS)
   Digital Library Federation / Aquifer Implementation Guidelines for Shareable MODS Records
Metadata Encoding & Transmission Standard (METS)
   METS Primer
Dublin Core Metadata Element Set (DC)
Encoded Archival Description (EAD)
Text Encoding Initiative (TEI)
Visual Resources Association Data Standards Committee Core Categories (VRA Core)
Categories for the Description of Works of Art (CDWA)
Data Documentation Initiative (DDI)
Learning Object Metadata (LOM)
Online Information Exchange (ONIX)

Thesauri and Controlled Vocabularies

Art & Architecture Thesaurus On Line (AAT)
Getty Thesaurus of Geographic Names On Line (TGN)
Union List of Artist Names On Line (ULAN)
Library of Congress Authorities
Thesaurus for Graphic Materials I: Subject Terms (TGM I)
Thesaurus for Graphic Materials II: Genre & Physical Characteristic Terms (TGM II)