Create a status assessment function

[nicholascar]

Using a SHACL file for LocI things (based on the LocI ont) and perhaps some follow-up SPARQL queries for Dataset/Linkset content, assess the status of all items in the catalogue and present a status marker in both the registers of items and Landing Pages.

Let's discuss the statuses possible. Probably only 'valid' & 'invalid' (from Registry Status Vocab).

For this task, you will need a completed LocI Ontology.