Support JSON-LD 1.1

[miguel76]

Add support for the new features introduced in JSON-LD 1.1

[stain]

In particular this example with localized @vocab/@context seems to fail:

{ "@context": {    
  "oa": "http://www.w3.org/ns/oa#",
  "link": "https://tools.ietf.org/vocab/rfc5988#",  
  "rel": {
    "@id": "link:rel",
    "@type": "@vocab",
    "@context": {"@vocab": "https://www.iana.org/assignments/link-relations/"}
  },
  "anchor": {"@id": "link:anchor", "@type": "@id"},
  "href": {"@id": "link:href", "@type": "@id"},
  "title": {
      "@id": "http://purl.org/dc/terms/title"
   }  
 },
 "@graph": [
  
   {"href"   : "http://example.com/foo",
    "title": "Fred",
    "meh": "fred",
    "anchor" : "http://example.net/bar",
    "rel" : [ "next" , "http://example.net/linkrel" ] }
  ] 
}

http://rdf.greggkellogg.net/distiller will correctly honour the inner @context and outputs:

[]
   <https://tools.ietf.org/vocab/rfc5988#rel> <https://www.iana.org/assignments/link-relations/next>,
       <http://example.net/linkrel> .

[CumpsD]

"@container": ["@set", "@language"], seems to fail as well:

Spec:
json-ld/json-ld.org#407
json-ld/json-ld.org#503

Example: http://tinyurl.com/y8ejvou9

[davidlehn]

At the moment none of 1.1 has been implemented due to lack of time and resources. We'll get to 1.1 as soon as we can. We want to use the fancy new features too! Any help would be appreciated. The 0.5.x branch has progress on other issues.

[davidlehn]

1.0.0 released supporting 1.1 draft features.
See https://github.com/digitalbazaar/jsonld.js#conformance.