v0.5.1

Changed

• Every disclosure on the specification page starts open. The "Reused" section
  was the one <details> left closed; it now carries open like the other three. A
  host relying on details:not([open]) to reach it needs re-checking.

Fixed

• A page's parent link requires the parent to be of the expected type. The
  concept page now requires its terminology (skos:inScheme) to be a
  skos:ConceptScheme, and the class and property pages their data vocabulary
  (rdfs:isDefinedBy) to be an owl:Ontology — in the header and in the infobox.
  The relation resolves by target URI, and a resource descriptor may share its URI
  with the subject it describes, so the link could resolve the RD describing the
  terminology or data vocabulary instead: wrong label, wrong target.
• The "Explore the AP" button is gated on the specification itself. It rendered
  whenever the spec had an application-profile resource descriptor, so a
  specification that is not an inspec:PROF but tagged its AP resource
  inspec:SHACL still got a button. The specification itself must now conform to
  inspec:PROF as well.