json-ld - 这是 JSON-LD 索引映射的正确使用吗？

Question

我想以 json-ld 格式创建一组人，但我需要保留一些键而不是使用数组，所以我首先尝试了这个:

{
  "@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"
    }
  }
}

在 JSON-LD Playground 中测试它，一切看起来都很好，N-Quads 结果显示如下:

<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> .

然后我想添加一个 schema:knows 属性也保留键而不使用这样的数组:

{
  "@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"
    }
  }
}

这次当我在操场上测试时，它返回以下错误:

{ "name": "jsonld.SyntaxError", "message": "Invalid JSON-LD syntax; conflicting @index property detected.", "details": { "code": "conflicting indexes", "subject": { "@id": "http://www.example.com/data/people/person2", "@index": "person2" } } }

那么什么是保留键而不使用数组或使用索引映射的正确方法的替代方法？

问候

Answer 1

这是对的。您在 jsonld.js ( which I already reported ) 中发现了一个错误。您可以尝试运行示例 in my playground或使用 Gregg Kellogg's RDF distiller service .两者都返回您期望的三元组。