on /pod/data-catalog, also link to the JSON-LD file
The 'format' field isn't an array after all.

After the 1.0 POD schema was finished, the example for 'format' showed it encoded as an array of strings. Some time later it was changed to be a string.
harvesting from data.json: make sure tags are perissible CKAN tag names using ckan.lib.munge.munge_title_to_name