{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "http://willrudolph.com/schema/sdj-schema.json",
  "type": "object",
  "title": "SDJ Schema",
  "required": [
    "$id",
    "description",
    "sdInfo",
    "data"
  ],
  "properties": {
    "$id": {
      "type": "string",
      "title":"Sdj Schema Reference"
    },
    "sdInfo": {
      "type": "object",
      "$ref": "#/$defs/info",
      "title": "File name, uniqId, created/modified for Json File."
    },
    "description": {
      "type": "object",
      "$ref": "#/$defs/description",
      "title": "Self Description Object for SDJ file."
    },
    "data": {
      "type": "array",
      "default": [],
      "title": "The top level data objects",
      "items": {
        "$ref": "#/$defs/data"
      }
    }
  },
  "additionalProperties": false,
  "$defs": {
    "description": {
      "type": "object",
      "description": "Description information for SDJ data",
      "properties": {
        "sdInfo": {
          "type": "object",
          "$ref": "#/$defs/info",
          "title": "Name, uniqId, created/modified for SDJ Description"
        },
        "items": {
          "type": "array",
          "default": [],
          "title": "The individual data item types referenced in plan",
          "items": {
            "$ref": "#/$defs/item"
          }
        },
        "graph": {
          "type": "array",
          "default": [],
          "title": "The array of entity types",
          "items": {
            "$ref": "#/$defs/entity"
          }
        },
        "lexicons": {
          "type": ["array", "null"],
          "title": "SDJ Description Lexicons associated with this description",
          "default": null,
          "items": {
            "type": "string"
          }
        },
        "lang": {
          "type": "string",
          "default": "en",
          "title": "The language of the text in the description/sdj",
          "examples": [
            "en"
          ]
        }
      },
      "additionalProperties": false,
      "required": [
        "sdInfo",
        "items",
        "graph"
      ]
    },
    "info": {
      "type": "object",
      "description": "Standardized set of values for name, uniqKey, created date, and last modified date",
      "properties": {
        "name": {
          "type": "string",
          "title": "Name of descriptor"
        },
        "uniqId": {
          "title": "Unique id for tracking, initialized on plan/data creation",
          "type": "string"
        },
        "created": {
          "title": "UTC Time descriptor was created",
          "type": "integer"
        },
        "modified": {
          "title": "UTC Time descriptor was last modified",
          "type": "integer"
        }
      },
      "required": ["name", "uniqId", "created", "modified"],
      "additionalProperties": false
    },
    "data": {
      "type": "object",
      "description": "Standardized expandable data object",
      "properties": {
        "sdKey": {
          "type": "string",
          "title": "Key id/name/route of data"
        },
        "sdId": {
          "title": "Entity sdId associated with data",
          "type": "integer"
        },
        "sdInfo": {
          "type": "object",
          "default": null,
          "title": "Optional descriptor object for tracking data changes",
          "items": {
            "$ref": "#/$defs/info"
          }
        },
        "sdChildren": {
          "title": "Child data array",
          "type": ["array", "null"],
          "default": null,
          "items": {
            "$ref": "#/$defs/data"
          }
        }
      },
      "required": ["sdKey", "sdId"],
      "additionalProperties": true
    },
    "entity": {
      "type": "object",
      "title": "Entity description of data as content/relationships",
      "properties": {
        "sdId": {
          "type": "integer",
          "title": "sdId of entity in description graph"
        },
        "sdKey": {
          "type": "string",
          "title": "sdKey for Entity"
        },
        "extendIds": {
          "type": ["array", "null"],
          "title": "Optional ids which current Entity extends",
          "default": null,
          "items": {
            "type": "integer",
            "title": "Extended entity ids",
            "uniqueItems": true
          }
        },
        "parentIds": {
          "type": ["array", "null"],
          "title": "Optional allowed entity's parent sdIds",
          "default": null,
          "items": {
            "type": "integer",
            "title": "Allowed parent entity ids",
            "uniqueItems": true
          }
        },
        "childIds": {
          "type": ["array", "null"],
          "title": "Optional allowed entity's children sdIds",
          "default": null,
          "items": {
            "type": "integer",
            "title": "Child entity id",
            "uniqueItems": true
          }
        },
        "sdItems": {
          "type": ["array", "null"],
          "default": null,
          "title": "Entity's associated item sdIds",
          "items": {
            "type": "integer",
            "title": "Entity's associated item sdId",
            "uniqueItems": true
          }
        },
        "limiter": {
          "type": ["string", "null"],
          "title": "Parallels to entity limiter, used for limitations",
          "default": null
        },
        "sdProps": {
          "type": ["object", "null"],
          "default": null,
          "title": "Extended assigned key/value props of entity",
          "additionalProperties": true
        },
        "dataInfo": {
          "type": ["boolean", "null"],
          "default": null,
          "title": "SDJ switch for uniqKey/creation/modification. If true systems will save and expect info per data object."
        }
      },
      "additionalProperties": false,
      "required": ["sdId", "sdKey"]
    },
    "item": {
      "title": "Describes a data item found in data object/entity",
      "type": "object",
      "properties": {
        "sdId": {
          "title": "sdId for item, used by entity",
          "type": "integer"
        },
        "sdKey": {
          "type": "string",
          "title": "sdKey property name found in data"
        },
        "type": {
          "type": "string",
          "title": "Type of data item"
        },
        "limiter": {
          "type": ["string", "null"],
          "title": "Parallels to entity limiter, used for limitations",
          "default": null
        }
      },
      "additionalProperties": false,
      "required": ["sdId", "sdKey", "type"]
    }
  }
}