EAD Document Type Definition (DTD) is a standard for encoding archival finding aids
using Extensible Markup Language (XML). The standard is maintained in the Network
Development and MARC Standards Office of the Library of Congress (LC) in partnership with
the Society of American Archivists.
A file is considered to be a FO document when the it's namespace is
urn:isbn:1-931666-22-9
or it's public ID is //DTD ead.dtd
(Encoded Archival Description (EAD) Version 2002)//EN
.