{
  "@context": {
    "@vocab": "https://schema.org/",
    "vonage": "https://developer.vonage.com/api/",
    "xsd": "http://www.w3.org/2001/XMLSchema#",

    "Message": "https://schema.org/Message",
    "text": "https://schema.org/text",
    "recipient": "https://schema.org/recipient",
    "sender": "https://schema.org/sender",
    "dateSent": "https://schema.org/dateSent",
    "messageAttachmentObject": "https://schema.org/messageAttachmentObject",

    "vonage:message_uuid": {"@type": "xsd:string"},
    "vonage:message_type": {"@type": "xsd:string"},
    "vonage:channel": {"@type": "xsd:string"},
    "vonage:client_ref": {"@type": "xsd:string"},
    "vonage:status": {"@type": "xsd:string"},

    "Call": "https://schema.org/Thing",
    "vonage:call_uuid": {"@type": "xsd:string"},
    "vonage:call_status": {"@type": "xsd:string"},
    "vonage:call_direction": {"@type": "xsd:string"},
    "vonage:call_duration": {"@type": "xsd:decimal"},
    "vonage:conversation_uuid": {"@type": "xsd:string"},

    "Verification": "https://schema.org/Thing",
    "vonage:request_id": {"@type": "xsd:string"},
    "vonage:verify_status": {"@type": "xsd:string"},

    "PhoneNumber": "https://schema.org/ContactPoint",
    "telephone": "https://schema.org/telephone",
    "vonage:msisdn": {"@type": "xsd:string"},
    "vonage:country": {"@type": "xsd:string"},
    "vonage:number_type": {"@type": "xsd:string"},
    "vonage:features": {"@type": "@vocab"},

    "Application": "https://schema.org/SoftwareApplication",
    "vonage:app_id": {"@type": "xsd:string"},
    "vonage:capabilities": {"@type": "@vocab"},

    "Organization": "https://schema.org/Organization",
    "vonage:api_key": {"@type": "xsd:string"}
  },
  "@graph": [
    {
      "@id": "https://developer.vonage.com/",
      "@type": "Organization",
      "name": "Vonage",
      "description": "Cloud communications APIs provider (part of Ericsson)",
      "url": "https://developer.vonage.com/"
    }
  ]
}