Make RDF available under prefix URL

[hoijui]

As suggested for example in: Recommended IRI patterns for ontologies and their terms,
It would be great if an HTTP(S) GET request on schema.org/ (and optionally on schema.org/SomeItem)
with a content-type header indicating any of the RDF serialization formats (for example "text/turtle"), would return the schema in that format.

This would make the development of tools browsing the semantic (RDF) web much easier, among other things.

An already quite elaborate version of doing this with .htaccess can be seen here:
https://github.com/perma-id/w3id.org/blob/master/valueflows/.htaccess

The respective content is already available here:
https://schema.org/docs/developers.html#defs

As of now, no matter which content-type is requested, one always gets HTML (without RDFa).