CRUDController: HTTP GET + JSON(-LD) + multiple hash IRIs

[bcogrel]

HTTP GET addresses an hash-less IRI which may correspond to multiple hash IRIs. If the requested representation is a regular RDF syntax, the response is easy.

However, this graph may different JSON-LD "shapes":

1. A flat graph ("@graph" object)
2. A main object at the root which should embed the others:

• Which one is it? The document? How to select it?
• Is it framed? See JSON-LD framing: http://json-ld.org/spec/latest/json-ld-framing/

[bcogrel]

The current implementation selects the document or one object arbitrarily.

I think that the flat graph should be the default option (same information than other RDF representations).

Framing is not (yet) supported.