Improve NOMAD DCAT Interface/API/Mapping

[TBoonX]

This issue is about improvements of the Interface/API/Mapping in order to have better information and links inside our LDM instance.
The list will grow and should be updated everytime a new improvements is detected or done.
Hint: We will extend the RDF to LDM data mapping in order to include more vocabularies into the harvesting. Thus missing or atm wrong RDF to LDM data mappings could be resolved with it.

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It could be helpful to have a look on our LDM instance and the DCAT to LDM mapping: https://github.com/ckan/ckanext-dcat#rdf-dcat-to-ckan-dataset-mapping

[mospring]

Can you be more specific? I don't see uri or guid anywhere in the DCAT output. There is the dcat:landing_page which works fine here.

[TBoonX]

The CKAN extension does not use the landingPage predicate it seems ...
Thus I have to adopt the Mapping in CKAN.
Sorry I didn't expect that and you are right the URL works.

[TBoonX]

For Improvements of the DCAT to CKAN mapping on the ckanext-dcat, see #31