Re-save from protege after adding owl:imports
versionIRI and imports
Added prov: namespace, make oa: explicit
Remove stray annotation property skos:inSchema
Additional namespaces mentioned in HTML

.. but not used directly here. For hint purposes only.
Added comments according to HTML

Based on
http://www.openannotation.org/spec/core/20130205/core.html

All rdfs:comment/rdfs:label should have language "en"
Description/label: specific resource and selectors

Taken from
http://www.openannotation.org/spec/core/20130205/specific.html