add ES-DOC documentation to LTA
1.1 API request by DRS the relevant ES-DOC documents -> to be selected which are relevant
1.2 LTA metadata organization is aligned with the granularities of the citation service
optional: add a link to ES-DOC on granularities specified in 1.2
Discuss the scope an implementation of archiving ES-DOC documents in to the IPCC DDC.
This will cover archival of documents and possible access interfaces.