[(#REM)
Metadonnées des formats disponibles sur le dépôt.
https://www.openarchives.org/OAI/openarchivesprotocol.html#ListMetadataFormats
This verb is used to retrieve the metadata formats available from a repository.
An optional argument restricts the request to the formats available for a specific item.
]oai_dc
http://www.openarchives.org/OAI/2.0/oai_dc.xsd
http://www.openarchives.org/OAI/2.0/oai_dc/