Filter empty datacite (ORC)ID fields

[mpsonntag]

The xml has empty ORCID fields because in the datacite the IDs are missing. Could that be filtered?

[mpsonntag]

As an example for the problem that occurred in DOI 6weafc:

A YAML entry

authors:
  - ...
    id: "ORCID:"

results in an XML entry

<nameIdentifier schemeURI="" nameIdentifierScheme="">ORCID:</nameIdentifier>

[achilleas-k]

The offending function/line is in libgin: https://github.com/G-Node/libgin/blob/7cddc5bb2c86ea49da5bec0df4a3a40f4896d40e/libgin/datacite.go#L191

The fallback result of the parse ID function, if it can't identify the type of ID or the ID doesn't match a known format, is to just return whatever the author provided with empty URI and scheme.

[mpsonntag]

IDs that provide a supported ID prefix (orcid and researcherid) but do not have a value, should not create an XML entry, a warning to the admin should be issued.

[mpsonntag]

Issue requires changes in G-Node/libgin.