{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "additionalProperties": false,
  "allOf": [
    {
      "required": ["namespace", "relation", "object"],
      "properties": {
        "$schema": {
          "type": "string",
          "format": "uri-reference",
          "description": "Add this to allow defining the schema, useful for IDE integration"
        },
        "namespace": {
          "type": "string",
          "description": "The namespace of the object and relation in this tuple."
        },
        "object": {
          "type": "string",
          "description": "The object affected by this relation."
        },
        "relation": {
          "type": "string",
          "description": "The relation of the object and subject."
        }
      }
    },
    {
      "oneOf": [
        {
          "required": ["subject_id"],
          "properties": {
            "subject_id": {
              "type": "string",
              "description": "The subject ID affected by this relation."
            }
          }
        },
        {
          "required": ["subject_set"],
          "properties": {
            "subject_set": {
              "type": "object",
              "description": "The subject set affected by this relation.",
              "properties": {
                "namespace": {
                  "type": "string",
                  "description": "The namespace of the object and relation in this subject set."
                },
                "object": {
                  "type": "string",
                  "description": "The object referenced in this subject set."
                },
                "relation": {
                  "type": "string",
                  "description": "The relation of this subject set."
                }
              },
              "additionalProperties": false,
              "required": ["namespace", "relation", "object"]
            }
          }
        }
      ]
    }
  ]
}