在JSON-LD中,是否可以扩展上下文？

Question

我有一个JSON-LD文档.

{
  "@id": "VDWW1LL3MZ",
  "first_name": "Vincent",
  "last_name": "Willems",
  "knows":["MartyP"],
  "@context": {
    "foaf": "http://xmlns.com/foaf/0.1/",
    "first_name": "foaf:givenName",
    "last_name": "foaf:familyName",
    "knows": "foaf:knows",
    "MartyP": { 
      "@id": "http://example.com/martyp",
      "first_name": "Marty",
      "last_name": "P"
    }
  }
}

现在,本文档的部分上下文是在运行时(Marty P对象)生成的,但foaf前缀定义是静态的,并且对每个文档都重复.

如果我有10个前缀定义,将它们放在每个文档中会感到浪费.所以我想做点什么

generated document:

{
  "@id": "VDWW1LL3MZ",
  "first_name": "Vincent",
  "last_name": "Willems",
  "knows":["MartyP"],
  "@context": {
    "@extends": "http://example.com/base_context.jsonld",
    "MartyP": { 
      "@id": "http://example.com/martyp",
      "first_name": "Marty",
      "last_name": "P"
    }
  }
}

base_context.jsonld:

  {
    "foaf": "http://xmlns.com/foaf/0.1/",
    "first_name": "foaf:givenName",
    "last_name": "foaf:familyName",
    "knows": "foaf:knows"
  }

这可能吗？

Answer 1

每个@context实际上可以是多个对象(或URL),然后按照它们出现的顺序组合(这样就可以改变术语的含义 - 注意那里).

要做到这一点,您可以使用一个数组,您可以在其中混合本地和外部上下文.这是你的榜样

{
  "@context": 
  [
    "http://example.com/base_context.jsonld",
    {
      "@vocab": "http://example.com/"
    }
  ]
}

它在JSON-LD规范的第6.7节中描述.