EAD: Encoded Archival Description Version 2002 Official Site (EAD Official Site, Library of Congress) General information version EAD3 - current EAD3 1.0 (from GitHub) EAD3 Schema and DTD EAD3 Tag Library New!
Metadata Object Description Schema: MODS. MADS User Guidelines, Version 2.0 (Metadata Authority Description Schema (MADS), Standards, Library of Congress) This document contains a listing of elements and their related attributes in the Metadata Authority Description Schema (MADS) 2.0 with values or value sources where applicable. It is an "outline" of the schema. The <madsCollection> element is used to contain a groups of MADS records, and the <mads> element is used to contain elements in an individual MADS record.
VRA CORE - a data standard for the description of works of visual culture: Official Web Site.