{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "choiceSet.json",
  "title": "Definitions: Choice.",
  "description": "Schemas in #/definitions detect or validate keys/objects used in describing Choice (Sections 3.2.7 and 3.2.8).",
  "definitions":
  {

    "itemsDetected" :
    {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Definition: items",
      "description": "True when the object includes items key and value of items is an array containing at least 1 item, which can be a specificResource, an externalWebResource, a uri, a textualBody or another choice/set (Sections 3.2.7 and 3.2.8).",
      "type": "object",
      "properties" :
      {
        "items" :
        {
          "type" : "array",
          "minItems": 1,
          "items": {
            "oneOf":
              [
                { "$ref": "specificResource.json#/definitions/specificeResourceDetected" },
                { "$ref": "bodyTarget.json#/definitions/externalWebResourceDetected" },
                { "$ref": "bodyTarget.json#/definitions/textualBodyFound" },
                { "$ref": "id.json#/definitions/stringUri" },
                { "allOf":
                  [
                     { "$ref" : "#/definitions/choiceOrSetTypeDefinition" },
                     { "$ref": "#/definitions/itemsDetected"  }
                  ]
                }
              ]
          }
        }
      },
      "required": [ "items" ]
    },

    "choiceTypeDefinition":
    {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Definition: Choice type",
      "description": "True when object has type key and object's type is 'Choice' (Section 3.2.7)",
      "type": "object",
      "properties":
      {
        "type":
        {
          "type": "string",
          "enum": ["Choice"]
        }
      },
      "required": [ "type" ]
    },

    "choiceOrSetTypeDefinition":
    {
       "$schema": "http://json-schema.org/draft-04/schema#",
       "title": "Definition: Choice or Set type",
       "description": "True when object has type key and object's type is any of 'Choice' (Section 3.2.7)",
       "type": "object",
       "properties":
       {
         "type":
         {
           "type": "string",
           "enum": ["Choice"]
         }
       },
            "required": [ "type" ]
    },

    "choiceDetected": {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Detection: Choice",
      "description": "True when object's type is 'Choice' and the object has an items array (Section 3.2.7)",
      "type": "object",
      "allOf":
        [
        { "$ref": "#/definitions/choiceTypeDefinition" },
        { "$ref": "#/definitions/itemsDetected" }
        ]
    },

    "choiceOrSetDetected": {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Detection: Choice or Set",
      "description": "True when object's type is one of Choice and the object has an items array (Section 3.2.7)",
      "type": "object",
      "allOf":
        [
           { "$ref": "#/definitions/choiceOrSetTypeDefinition" },
           { "$ref": "#/definitions/itemsDetected" }
        ]
    },

    "choiceSetWithValue" :
    {
        "allOf":
           [
            { "$ref": "#/definitions/choiceOrSetDetected" },
            { "required": [ "value" ] }
           ]
    },

    "choiceSetWithSource" :
    {
        "allOf":
           [
            { "$ref": "#/definitions/choiceOrSetDetected" },
            { "required": [ "source" ] }
           ]
    },

    "choiceSetWithPurpose" :
    {
        "allOf":
           [
            { "$ref": "#/definitions/choiceOrSetDetected" },
            { "required": [ "purpose" ] }
           ]
    }

  }
}