Linking DataCite metadata to ISO 19115/19139 metadata using relatedIdentifiers

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Hi everyone,
In our metadata catalog (http://data.ingv.it/) I would like to link the DataCite metadata about a dataset to the corresponding ISO 19115/19139 metadata by adding a dedicated “relatedIdentifiers” entry.
I could not find any official guideline about this particular case, at least not on the DataCite manual and on the web I am unable to find any guidance. It seems quite strange a complete lack of examples, as both these standards are quite common.

As the relatedMetadataScheme is uncontrolled, I am in doubt on how to provide a solid linking and Mary Hirsch (DataCite support) kindly suggested me to look at examples launching the following query
https://api.datacite.org/dois?query=relatedIdentifiers.relationType:HasMetadata%20and%20relatedIdentifiers.relatedMetadataScheme:*19139*

I found two examples, the first one provided by the curators of https://navigator.eumetsat.int/
https://data.crosscite.org/application/vnd.datacite.datacite+json/10.15770/eum_sec_clm_0039
“schemeUri”: “http://schemas.opengis.net/csw/2.0.2/csw.xsd”,
“schemeType”: “xsd”,
“relationType”: “HasMetadata”,
“relatedIdentifier”: “https://navigator.eumetsat.int/elastic-csw/service?service=CSW&version=2.0.2&request=GetRecordById&elementSetName=full&outputSchema=http://www.eumetsat.int/2008/gmi&id=EO:EUM:DAT:0617”,
“relatedIdentifierType”: “URL”,
“relatedMetadataScheme”: “http://schemas.opengis.net/iso/19139/20060504/gmd/gmd.xsd”

And a second example from the curators of https://data.marine.ie/
https://data.crosscite.org/application/vnd.datacite.datacite+json/10.20393/6410adf9-8a4e-44d3-a388-40d85827b696
“schemeUri”: “http://schemas.opengis.net/iso/19139/20070417/gmd/gmd.xsd”,
“relationType”: “HasMetadata”,
“relatedIdentifier”: “http://data.marine.ie/geonetwork/srv/eng/catalog.search#/metadata/ie.marine.data:dataset.4908”,
“relatedIdentifierType”: “URL”,
“relatedMetadataScheme”: “ISO19139”

Any suggestions on which is the best solution to adopt?

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Thanks for the question @mario.locati I’m hoping @KellyStathis or @lizkrz can help

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Hi @mario.locati, thanks for sharing this question here!

My understanding is that relatedMetadataScheme is meant to contain the name of the schema, wheres schemeURI should contain a resolvable URI pointing to the schema. The DataCite Metadata Schema has one example of this (see the PDF linked from DataCite Schema):

<relatedIdentifier relatedIdentifierType="DOI" relationType="HasMetadata" relatedMetadataScheme="DDI-L" schemeURI="http://www.ddialliance.org/Specification/DDILifecycle/3.1/XMLSchema/instance.xsd">10.1234/567890</relatedIdentifier>

So In this case, I would recommend that the related metadata scheme be ISO 19139, following the second example.

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Thank you for answering, that was exactly the same idea I’ve got.
I really hope that a vocabulary will be introduced in the future for controlling “relatedMetadataScheme”.

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