I've been working on a new version of a Data Type model for consideration by the working group. We're testing in the context of an EarthCube Building Block project (Digital Crust, the regitry is called 'Information Exchange Registry' in the architecture diagrams) for use in registering heterogeneous tabular datasets to enable (in the goal state) more automated data integration.
A test instance is deployed at http://22.214.171.124:32781/class/_data-object (note that attribute element bindings have only been implemented for a few data objects, e.g. 'cPHydro observation data' or 'Geothermal Power Plant Occurrence').
The ontology is registed in a test ESIP ontology registry at http://cor.esipfed.org/ont/?uri=http://resources.usgin.org/uri-gin/dtr/o...
Maintenance is in GitHub at https://github.com/usgin/digital-crust-LDR.
I'm looking forward to discussions in Denver.