Proposed extension: Content Negotiation by Profile

[tpluscode]

By using the https://www.w3.org/TR/dx-prof-conneg specification it could be possible to give clients control of what representation they get when dereferencing specific resources:

• a well-known Profile to request a "core" representation, without any inferences, etc (see Separating GET and PUT requests (a'la CQRS) Specifications#234 (comment))
• using SHACL Shapes to request specific graphs representing a resource

The second can be made especially powerful, in that if a server chooses to dereference a shape it does not necessarily know, the client could almost use SHACL as a GraphQL-like tool to request any arbitrary shape