json_schema: {
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "Systems list",
    "type": "array",
    "items": {
      "title": "System",
      "type": "object",
      "properties": {
        "name": {
          "description": "System name",
          "type": "string"
        },
        "coords": {
          "description": "System coordinates",
          "type": "object",
          "properties": {
            "x": {
              "description": "X coord",
              "type": "integer"
            },
            "y": {
              "description": "Y coord",
              "type": "integer"
            },
            "z": {
              "description": "Z coord",
              "type": "integer"
            }
          },
          "required": [
            "x",
            "y",
            "z"
          ]
        },
        "type": {
          "description": "The stellar type: A, B, O...",
          "type": "integer"
        },
        "infos": {
          "description": "A custom description for the system",
          "type": "string"
        },
        "cat": {
          "description": "A list of categories for the system",
          "type": "array",
          "items": {
            "type": "integer"
          }
        }
      },
      "required": [
        "name",
        "coords"
      ]
    }
  }
  