It is too hard for mainstream developers to consume our schema definitions. This is holding back tool development and is easily enough fixed. a JSON view of the hiearrchy would go a long way towards fixing this (but see also meta bug, re CSV and other formats for other audiences, #208 ).

Proposal: a single doc with brief description of all types, JSON-LD in a form that counts as W3C RDFS and also fits default D3.js hieararchy visualizations.