[OSGeo-Standards] DOIs for Datasets

[Joana Simoes]

Good evening,

I was wondering if anyone has experience/best practices to share 
regarding generating DOIs for datasets that are hosted on a SDI?

Research resources, including data, are encouraged to adopt Digital 
Object Identifiers (DOI) to identify objects persistently. They allow 
things to be uniquely identified and accessed reliably.

 From what I understand, these DOIs need to be generated by one of the 
registration agencies under the DOI foundation (https://www.doi.org/). 
Some of these agencies, like Zenodo (https://zenodo.org/), will generate 
the DOIs for free, but the issue I see is that they require the data to 
be hosted on their repositories. I see this as a duplication of 
information if the data already lives on a SDI, raising a series of 
issues (maintaining the data in both places, duplication of storage, etc).

What would be the best approach, to keep the data (and metadata) on the 
SDI, but still be able to reference it as a citation?

In this context, would it make sense to give up on the DOI and go for a 
Persistent Uniform Resource Locator (PURL)?

This would be an example of a Purl:

https://doi.byteroad.net/emotional.cities/hex350_grid_cardio_1920

Looking forwards for your thoughts on this.

                                   Thank You,

                                        All the Best,

                                                 Joana