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EAD And METS
Both of Encoded
Archival Description (EAD) and Metadata
Encoding & Transmission Standard (METS) are maintained
in the Network Development and MARC Standards Office of
the Library of Congress.
The METS
schema is a standard using the XML to encode descriptive,
administrative, and structural metadata for objects within
a digital library. It is being developed as an initiative
of the Digital Library
Federation, based on the Making
of America II project. METS attempts to provide an
encoding Metadata to manage the digital objects within
the digital library, and exchange those digital objects
between different digital libraries.
A METS document consists of four major sections:
Descriptive Metadata, Administrative Metadata, File Groups,
and Structure Maps. Its Website provides the detail function
of these sections and samples of using METS Metadata.
EAD
is a set of rules for preserving the hierarchy and designating
the intellectual and physical parts of archival finding
aids to help search, display and exchange archives and
manuscript collections. The EAD rules are written in the
form of a Standard Generalized Markup Language (SGML)
Document Type Definition (DTD), because archival description
emphasizes intellectual structure and content more than
bibliographic description, making SGML, and later XML,
a more suitable transport syntax than MARC.
The EAD is grouped into two parts: bibliographic
header () and the marked
up finding aid itself ().
The header only describes the finding aid, and finding
aid is used to describe the collection. Both of them contain
the EAD elements for the description. The EAD Tag Library
contains all EAD data elements defined in the DTD. It
serves as a reference tool for archivists who decide which
EAD elements to use when designating the content of their
finding aids. There are 145 elements in the EAD
Tag Library. But only a few are the required elements
in EAD DTD. Others are optional, which depend on the requirements
of individual collection.
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