Metadata Encoding & Transmission Standard

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The Metadata Encoding & Transmission Standard  ( METS ) is an XML format defined with XML schema for the description of digital collections of objects with metadata .


In a digital archive , metadata about these objects must be managed in addition to the digital objects. In addition to the object description ( e.g. title , creation date ), this metadata can also contain information about the document in the archive (e.g. which archivist put it in the archive and when ). METS provides a structure for this information.

METS can be used to code hierarchical and otherwise structured works. A work can z. B. a book series , a single book with chapter and page structure or a film with several scenes.


METS is divided into 7 areas:

1 <mets>
2  <metsHdr/>
3  <dmdSec/>
4  <amdSec/>
5  <fileSec/>
6  <structMap/>
7  <structLink/>
8  <behaviorSec/>
9 </mets>

The sections are in detail:

  1. METS Header metsHdr : Metadata describing the METS document.
  2. Descriptive Metadata Section dmdSec : The Erschließungs data of the object.
  3. Administrative Metadata Section amdSec : Administrative information such as the origin of the object, copyrights , information on the storage of the object.
  4. File Section fileSec : All files belonging to the object.
  5. Structural Map structMap : Description of the internal structure of the object.
  6. Structural Links structLink : Contains links between elements, e.g. for archiving websites .
  7. Behavioral Section behaviorSec : This section can be used to connect executable elements ( e.g. web services ) to the METS package.

In principle, the format of the metadata in the individual sections can be different and is not determined by METS. Different formats can be used in a METS document, e.g. B. MAB , MARC , MODS , Dublin Core , MIX ....

A subset of the XLink scheme is used to link METS files and the digital objects about which statements are to be made .

METS is administered by the Library of Congress . Version 1.11 was adopted in January 2015.

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