{
  "description": "OpenContainer Config Specification",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "https://opencontainers.org/schema/image/config",
  "type": "object",
  "properties": {
    "created": {
      "type": "string",
      "format": "date-time"
    },
    "author": {
      "type": "string"
    },
    "architecture": {
      "type": "string"
    },
    "os": {
      "type": "string"
    },
    "config": {
      "type": "object",
      "properties": {
        "User": {
          "type": "string"
        },
        "ExposedPorts": {
          "$ref": "defs.json#/definitions/mapStringObject"
        },
        "Env": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "Entrypoint": {
          "oneOf": [
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            },
            {
              "type": "null"
            }
          ]
        },
        "Cmd": {
          "oneOf": [
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            },
            {
              "type": "null"
            }
          ]
        },
        "Volumes": {
          "oneOf": [
            {
              "$ref": "defs.json#/definitions/mapStringObject"
            },
            {
              "type": "null"
            }
          ]
        },
        "WorkingDir": {
          "type": "string"
        },
        "Labels": {
          "oneOf": [
            {
              "$ref": "defs.json#/definitions/mapStringString"
            },
            {
              "type": "null"
            }
          ]
        }
      }
    },
    "rootfs": {
      "type": "object",
      "properties": {
        "diff_ids": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "type": {
          "type": "string",
          "enum": [
            "layers"
          ]
        }
      },
      "required": [
        "diff_ids",
        "type"
      ]
    },
    "history": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "created": {
            "type": "string",
            "format": "date-time"
          },
          "author": {
            "type": "string"
          },
          "created_by": {
            "type": "string"
          },
          "comment": {
            "type": "string"
          },
          "empty_layer": {
            "type": "boolean"
          }
        }
      }
    }
  },
  "required": [
    "architecture",
    "os",
    "rootfs"
  ]
}