Add export formats

[kpsherva]

• [x] DataCite v4 XML (search, OAI-PMH) (https://github.com/inveniosoftware/invenio-rdm-records/issues/1199)
• [x] DCAT-AP
  • [x] search (https://github.com/inveniosoftware/invenio-rdm-records/issues/1202)
  • [x] OAI-PMH (https://github.com/inveniosoftware/invenio-rdm-records/issues/1234)
• [x] MARC21 XML
  • [x] search (https://github.com/inveniosoftware/invenio-rdm-records/issues/1165)
  • [x] OAI-PMH (https://github.com/inveniosoftware/invenio-rdm-records/issues/1173)
• [x] BibTex (search) (https://github.com/inveniosoftware/invenio-rdm-records/issues/1208)
• [x] DublinCore (search, OAI-PMH) (https://github.com/inveniosoftware/invenio-rdm-records/issues/1201)
• [ ] JSON-LD (external contribution - do not take this one)
• [x] https://github.com/inveniosoftware/invenio-rdm-records/issues/1154

Prerequisites

• All metadata fields currently supported in Zenodo have to be part of the deposit form and metadata schema
• Files indexing and serialization for search results

Next Steps

1. Review DataCite mapping a. Migrate DCAT-AP using XSLT and custom logic for files serialization
2. Review DublinCore
3. Migrate MARC21 XML
4. Migrate BibTex
5. Migrate JSON-LD
6. Migrate GeoJSON
7. Allow instances to configure their own import/export types for REST API
   • One of the current issues is that a ResourceConfig is not easy to override/configure (we want to override request_body_parsers and response_handlers)
   • We should look into using something like the FromConfig utility that's used in services, e.g. for the permission_policy_cls

[ppanero]

search accepts:

• application/json
• application/vnd.inveniordm.v1+json
• application/vnd.citationstyles.csl+json
• application/vnd.datacite.datacite+json
• application/vnd.geo+json
• application/vnd.datacite.datacite+xml
• application/x-dc+xml
• text/x-bibliography

These are defined in the APP_RDM_RECORD_EXPORTERS config variable by the content-type attribute. The ones that do not appear (MarcXML, DublinCore) is because they are not suitable for "list/search" serialization.

Action points:

• Should we implement list on those above? To be added here https://github.com/inveniosoftware/invenio-rdm-records/blob/e4ced718577efaa78f8586339d4a5f19452c44ba/invenio_rdm_records/resources/config.py#L64
• Should we add versioning to the serialization (e.g. datacite v4.3, v4.4, etc.)