Add support for JSON-LD

[lanthaler]

Have you considered supporting JSON-LD as well? I think that would be quite straightforward given that everything is in RDF. Probably the simplest thing would be to use an existing JSON-LD processor and convert the N-Triples (N-Quads) automatically to JSON-LD. With my processor (https://github.com/lanthaler/JsonLD) the code would look more or less like this:

use ML\JsonLD\JsonLD;

$document = JsonLD::fromQuads($quads);

//  Optional: use short terms instead of full IRIs for properties
$document = JSONLD::compact($document, 'context.jsonld');

print JsonLD::toString($document, true);

This would then output something along the lines of:

{
  "@context": {
    // the context used above
  },
  "@id": "https://my-profile.eu/people/deiu/card#me>",
  "@type": "Person",
  "name": "Andrei Vlad Sambra",
  "givenName": "Andrei Vlad"
}

[deiu]

Hey!

Yeah, I want to provide JSON-LD in a future release (soon ™). I'll give your code a try as soon as I can. :)

[lanthaler]

Great! Please keep me posted