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[EP-tech] datacite, DOI

i'm thinking of an eprints plugin for automatic mint of DOI
identifiers using the datacite provider.
Datacite[1] offer (for his members) an http api[2] for generation of
DOI identifiers.

The workflow has two steps:
(a) generate the DOI for an URL[3]
(b) send metadata[4] in xml[5] for the previously generated identifier

the (a) should be easy, with a synchronous call:
i'm thinking to add a boolean and a text field to eprints.
the boolean fields is showed somewhere in the workflow, if checked
eprints_fields_automatic.pl will trigger the call to the api, and save
the returned
DOI. at this point the identifier is usable and resolvable

this code is reusable:

the (b) step, even if is not mandatory, will require to export the
metadata in the datacite schema
and store[4] for the identifier.
This activity could slow the edit interface if made with a synchronous call,
how do you suggest to do?

the Event plugin could be a solution?

Is yet developed something similar?

[1] http://www.datacite.org
[2] https://mds.datacite.org/static/apidoc
[3] https://mds.datacite.org/static/apidoc#tocAnchor-14
[4] https://mds.datacite.org/static/apidoc#tocAnchor-17
[5] http://schema.datacite.org/