{
  "id": "extent.json#",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "description": "Information about the geographic, vertical, and temporal extent of a resource.",
  "example": "../../examples/full_example.json#/metadata/resourceInfo/extent",
  "translation": {
    "ISO 19115-2": ["EX_Extent"]
  },
  "additionalProperties": true,
  "properties": {
    "description": {
      "type": "string",
      "description": "Description of the geographic extent.",
      "translation": {
        "ISO 19115-2": ["EX_Extent > description"]
      }
    },
    "geographicElement": {
      "type": "array",
      "description": "An array of objects each describing a geographic boundary or location comprising all or a portion of the resource.",
      "translation": {
        "ISO 19115-2": ["EX_Extent > geographicElement"]
      },
      "items": {
        "type": "object",
        "example": "../../examples/full_example.json#/metadata/resourceInfo/extent/0/geographicElement",
        "properties": {
          "type": {
            "enum": ["Feature", "FeatureCollection", "GeometryCollection", "Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon"],
            "description": "The type of geographic object."
          }
        },
        "oneOf": [
          {
            "$ref": "geojson/geojson.json#"
          }
        ]
      }
    },
    "verticalElement": {
      "type": "array",
      "description": "An array of objects each describing a vertical boundary comprising all or a portion of the resource.",
      "translation": {
        "ISO 19115-2": ["EX_Extent > verticalElement > EX_VerticalExtent "]
      },
      "items": {
        "$ref": "#/definitions/verticalExtent"
      }
    },
    "temporalElement": {
      "$ref": "#/definitions/temporalElement",
      "description": "An array of objects each describing a temporal boundary comprising all or a portion of the resource."
    }
  },
  "definitions": {
    "timeInstant": {
      "type": "object",
      "example": "../../examples/full_example.json#/metadata/resourceInfo/extent/0/temporalElement/timeInstant/0",
      "required": ["timePosition"],
      "additionalProperties": true,
      "properties": {
        "id": {
          "type": "string",
          "description": "A unique identifier for the timeInstant.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimeInstant @id"]
          }
        },
        "description": {
          "type": "string",
          "description": "A brief description providing relevant information about the date and time.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimeInstant > description"]
          }
        },
        "timePosition": {
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimeInstant > timePosition"]
          },
          "$ref": "../schema.json#/definitions/date"
        }
      }
    },
    "timePeriod": {
      "type": "object",
      "description": "A span of time represented by a starting date-time and an ending date-time.",
      "example": "../../examples/full_example.json#/metadata/resourceInfo/extent/0/temporalElement/timePeriod/0",
      "additionalProperties": true,
      "properties": {
        "id": {
          "type": "string",
          "description": "A unique identifier for a time period.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimePeriod @id"]
          }
        },
        "description": {
          "type": "string",
          "description": "A brief description providing relevant information about the time period.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimePeriod > description "]
          }
        },
        "beginPosition": {
          "description": "Starting date, or date and time.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimePeriod > beginPosition "],
            "FGDC CSDGM": ["idinfo > timeperd > rngdates > begdate"]
          },
          "$ref": "../schema.json#/definitions/date"
        },
        "endPosition": {
          "description": "Ending date, or date and time.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimePeriod > endPosition"],
            "FGDC CSDGM": ["idinfo > timeperd > rngdates > enddate"]
          },
          "$ref": "../schema.json#/definitions/date"
        }
      },
      "anyOf": [
        {
          "title": "beginPosition required",
          "required": ["beginPosition"]
        }, {
          "title": "endPosition required",
          "required": ["endPosition"]
        }
      ]
    },
    "temporalElement": {
      "type": "object",
      "description": "Temporal context for the resource.",
      "example": "../../examples/full_example.json#/metadata/resourceInfo/extent/0/temporalElement",
      "translation": {
        "ISO 19115-2": ["EX_Extent > temporalElement > EX_TemporalExtent"]
      },
      "additionalProperties": true,
      "minProperties": 1,
      "properties": {
        "timeInstant": {
          "type": "array",
          "description": "A set of date-time instances, each with an associated identifier and description.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimeInstant"]
          },
          "items": {
            "$ref": "#/definitions/timeInstant"
          }
        },
        "timePeriod": {
          "type": "array",
          "description": "A set of time periods(a span of time represented by a starting date-time and an ending date-time).",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimePeriod"]
          },
          "items": {
            "$ref": "#/definitions/timePeriod"
          }
        },
        "date": {
          "type": "array",
          "description": "A set of date-times.",
          "translation": {
            "ISO 19115-2": ["EX_TemporalExtent > extent > TimeInstant > timePosition"]
          },
          "items": {
            "$ref": "../schema.json#/definitions/date"
          }
        }
      }
    },
    "verticalExtent": {
      "type": "object",
      "description": "Vertical element of an extent.",
      "translation": {
        "ISO 19115-2": ["EX_Extent > verticalElement > EX_VerticalExtent "]
      },
      "additionalProperties": true,
      "required": ["minimumValue", "maximumValue", "verticalCRSTitle", "verticalCRSUri"],
      "properties": {
        "minimumValue": {
          "type": "number",
          "description": "Lowest vertical extent contained in the dataset.",
          "translation": {
            "ISO 19115-2": ["EX_VerticalExtent > minimumValue > Real "]
          }
        },
        "maximumValue": {
          "type": "number",
          "description": "Highest vertical extent contained in the dataset.",
          "translation": {
            "ISO 19115-2": ["EX_VerticalExtent > maximumValue > Real "]
          }
        },
        "verticalCRSTitle": {
          "type": "string",
          "description": "Name of a geographic reference system associated with a vertical extent.",
          "translation": {
            "ISO 19115-2": ["EX_VerticalExtent > verticalCRS @xlink:title "],
            "FGDC CSDGM": ["spref > vertdef > altsys > altdatum"]
          }
        },
        "verticalCRSUri": {
          "description": "Web link to the parameters for a geographic reference system associated with a vertical extent.",
          "translation": {
            "ISO 19115-2": ["EX_VerticalExtent > verticalCRS @xlink:href "]
          },
          "$ref": "../schema.json#/definitions/uri"
        }
      }
    }
  }
}