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Is this the correct use of JSON-LD indexes?

I want to create a collection of people in json-ld format, but I need to save some keys instead of using arrays, so I tried this first:

{
  "@context" : {
    "@base" : "http://www.example.com/data/",
    "@vocab" : "http://www.example.com/vocab#",
    "name" : "schema:name",
    "people" : {
      "@container" : "@index",
      "@id" : "people"
    },
    "schema" : "http://schema.org/"
  },
  "@id" : "http://www.example.com",
  "people" : {
    "person1" : {
      "@id" : "people/person1",
      "name" : "Person 1"
    },
    "person2" : {
      "@id" : "people/person2",
      "name" : "Person 2"
    },
    "person3" : {
      "@id" : "people/person3",
      "name" : "Person 3"
    },
    "person4" : {
      "@id" : "people/person4",
      "name" : "Person 4"
    }
  }
}

Testing it on a JSON-LD playground looks great, and the N-Quads result shows something like this:

<http://www.example.com/data/people/person1> <http://schema.org/name> "Person 1" .
<http://www.example.com/data/people/person2> <http://schema.org/name> "Person 2" .
<http://www.example.com/data/people/person3> <http://schema.org/name> "Person 3" .
<http://www.example.com/data/people/person4> <http://schema.org/name> "Person 4" .
<http://www.example.com> <http://www.example.com/vocab#people> <http://www.example.com/data/people/person1> .
<http://www.example.com> <http://www.example.com/vocab#people> <http://www.example.com/data/people/person2> .
<http://www.example.com> <http://www.example.com/vocab#people> <http://www.example.com/data/people/person3> .
<http://www.example.com> <http://www.example.com/vocab#people> <http://www.example.com/data/people/person4> .

Then I wanted to add a scheme: it knows a property that also stores keys and does not use such arrays:

{
  "@context" : {
    "@base" : "http://www.example.com/data/",
    "@vocab" : "http://www.example.com/vocab#",
    "knows" : {
      "@container" : "@index",
      "@id" : "schema:knows",
      "@type" : "@id"
    },
    "name" : "schema:name",
    "people" : {
      "@container" : "@index",
      "@id" : "people"
    },
    "schema" : "http://schema.org/"
  },
  "@id" : "http://www.example.com",
  "people" : {
    "person1" : {
      "@id" : "people/person1",
      "knows" : {
        "person2" : "people/person2",
        "person3" : "people/person3"
      },
      "name" : "Person 1"
    },
    "person2" : {
      "@id" : "people/person2",
      "name" : "Person 2"
    },
    "person3" : {
      "@id" : "people/person3",
      "name" : "Person 3"
    },
    "person4" : {
      "@id" : "people/person4",
      "name" : "Person 4"
    }
  }
}

This time, when I tested on the playground, it returns the following error:

{ "name": "jsonld.SyntaxError", "message": " JSON-LD; @index.", "details": { "code": " ", "": { "@id": " http://www.example.com/data/people/person2", "@index": "person2" }} }

, ?

+4
1

. jsonld.js( ). Gregg Kellogg RDF . , .

+2

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