See e.g. HCRT ([SKOS/Turtle](https://github.com/dini-ag-kim/hcrt/blob/master/hcrt.ttl), [SkoHub version](https://w3id.org/kim/hcrt/scheme)). In the turtle we have several fields that are not shown unter https://w3id.org/kim/hcrt/scheme: - `dct:publisher` - `dct:issued` - `vann:preferredNamespaceUri` - `vann:preferredNamespacePrefix` - `dct:license` These should also be shown on the concept scheme page, in particular `dct:publisher`, `dct:issued` and `dct:license`. Also: Add documentation for vocabulary maintainers how to use these fields.