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
.