{
  "$schema": "http://json-schema.org/draft-04/schema#",

  "definitions": {

    "dcosReleaseVersion": {
      "type": "string",
      "pattern": "^(?:0|[1-9][0-9]*)(?:\\.(?:0|[1-9][0-9]*))*$",
      "description": "A string representation of a DC/OS Release Version"
    },

    "url": {
      "type": "string",
      "allOf": [
        { "format": "uri" },
        { "pattern": "^https?://" }
      ]
    },


    "v20Package": {
      "properties": {
        "packagingVersion": {
          "type": "string",
          "enum": ["2.0"],
          "description": "The version of the packaging format. Please do not use this version. It is only here for backwards compatibility. We recommend you use the latest version."
        },
        "name": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
          "description": "The name of the package."
        },
        "version": {
          "type": "string",
          "description": "The version of the package. We recommend that you use semantic versions. See http://semver.org/ for more details on semantic versions."
        },
        "scm": {
          "type": "string",
          "description": "Source control management. This is generally the URL of the project GitHub repository."
        },
        "maintainer": {
          "type": "string",
          "description": "The maintainer of the package. This is generally an email address."
        },
        "website": {
          "type": "string",
          "description": "URL to the website of a project. This is generally the URL of the project GitHub repository."
        },
        "description": {
          "type": "string",
          "description": "Detailed description of what the package does."
        },
        "framework": {
          "type": "boolean",
          "default": false,
          "description": "True if this package installs a new Mesos framework."
        },
        "preInstallNotes": {
          "type": "string",
          "description": "Pre installation notes that would be useful to the user of this package."
        },
        "postInstallNotes": {
          "type": "string",
          "description": "Post installation notes that would be useful to the user of this package."
        },
        "postUninstallNotes": {
          "type": "string",
          "description": "Post uninstallation notes that would be useful to the user of this package."
        },
        "tags": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[^\\s]+$"
          },
          "description": "A list of keywords associated with the package."
        },
        "selected": {
          "type": "boolean",
          "description": "Flag indicating if the package is selected in search results",
          "default": false
        },
        "licenses": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "name": {
                "type": "string",
                "description": "The name of the license. For example one of [Apache License Version 2.0 | MIT License | BSD License | Proprietary]"
              },
              "url": {
                "$ref": "#/definitions/url",
                "description": "The URL where the license can be accessed"
              }
            },
            "additionalProperties": false,
            "required": [
              "name",
              "url"
            ]
          }
        }
      },
      "required": [
        "packagingVersion",
        "name",
        "version",
        "maintainer",
        "description",
        "tags"
      ],
      "additionalProperties": false
    },

    "v30Package": {
      "properties": {
        "packagingVersion": {
          "type": "string",
          "enum": ["3.0"],
          "description": "The version of the packaging format."
        },
        "name": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
          "description": "The name of the package."
        },
        "version": {
          "type": "string",
          "pattern": "^[-a-zA-Z0-9.]+$",
          "description": "The version of the package. We recommend that you use semantic versions. See http://semver.org/ for details on semantic versions."
        },
        "scm": {
          "type": "string",
          "description": "Source control management. This is generally the URL of the project GitHub repository."
        },
        "maintainer": {
          "type": "string",
          "description": "The maintainer of the package. This is generally an email address."
        },
        "website": {
          "type": "string",
          "description": "URL to the website of a project. This is generally the URL of the project GitHub repository."
        },
        "description": {
          "type": "string",
          "description": "Detailed description of what the package does."
        },
        "framework": {
          "type": "boolean",
          "default": false,
          "description": "True if this package installs a new Mesos framework."
        },
        "preInstallNotes": {
          "type": "string",
          "description": "Pre installation notes that would be useful to the user of this package."
        },
        "postInstallNotes": {
          "type": "string",
          "description": "Post installation notes that would be useful to the user of this package."
        },
        "postUninstallNotes": {
          "type": "string",
          "description": "Post uninstallation notes that would be useful to the user of this package."
        },
        "tags": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[^\\s]+$"
          },
          "description": "A list of keywords associated with the package."
        },
        "selected": {
          "type": "boolean",
          "description": "Flag indicating if the package is selected in search results",
          "default": false
        },
        "licenses": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "name": {
                "type": "string",
                "description": "The name of the license. For example one of [Apache License Version 2.0 | MIT License | BSD License | Proprietary]"
              },
              "url": {
                "$ref": "#/definitions/url",
                "description": "The URL where the license can be accessed"
              }
            },
            "additionalProperties": false,
            "required": [
              "name",
              "url"
            ]
          }
        },
        "minDcosReleaseVersion": {
          "$ref": "#/definitions/dcosReleaseVersion",
          "description": "The minimum DC/OS Release Version the package can run on."
        }
      },
      "required": [
        "packagingVersion",
        "name",
        "version",
        "maintainer",
        "description",
        "tags"
      ],
      "additionalProperties": false
    },

    "v40Package": {
      "properties": {
        "packagingVersion": {
          "type": "string",
          "enum": ["4.0"],
          "description": "The version of the packaging format."
        },
        "name": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
          "description": "The name of the package."
        },
        "version": {
          "type": "string",
          "pattern": "^[-a-zA-Z0-9.]+$",
          "description": "The version of the package. We recommend that you use semantic versions. See http://semver.org/ for details on semantic versions."
        },
        "scm": {
          "type": "string",
          "description": "Source control management. This is generally the URL of the project GitHub repository."
        },
        "maintainer": {
          "type": "string",
          "description": "The maintainer of the package. This is generally an email address."
        },
        "website": {
          "type": "string",
          "description": "URL to the website of a project. This is generally the URL of the project GitHub repository."
        },
        "description": {
          "type": "string",
          "description": "Detailed description of what the package does."
        },
        "framework": {
          "type": "boolean",
          "default": false,
          "description": "True if this package installs a new Mesos framework."
        },
        "upgradesFrom": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "List of versions that can upgrade to this package. If the property is a list containing the string '*', any version can upgrade to this package. If the property is not set or the empty list, no version can upgrade to this package."
        },
        "downgradesTo": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "List of versions that this package can downgrade to. If the property is a list containing the string '*', this package can downgrade to any version. If the property is not set or the empty list, this package cannot downgrade."
        },
        "preInstallNotes": {
          "type": "string",
          "description": "Pre installation notes that would be useful to the user of this package."
        },
        "postInstallNotes": {
          "type": "string",
          "description": "Post installation notes that would be useful to the user of this package."
        },
        "postUninstallNotes": {
          "type": "string",
          "description": "Post uninstallation notes that would be useful to the user of this package."
        },
        "tags": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[^\\s]+$",
          "description": "A list of keywords associated with the package."
          }
        },
        "selected": {
          "type": "boolean",
          "description": "Flag indicating if the package is selected in search results",
          "default": false
        },
        "licenses": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "name": {
                "type": "string",
                "description": "The name of the license. For example one of [Apache License Version 2.0 | MIT License | BSD License | Proprietary]"
              },
              "url": {
                "$ref": "#/definitions/url",
                "description": "The URL where the license can be accessed"
              }
            },
            "additionalProperties": false,
            "required": [
              "name",
              "url"
            ]
          }
        },
        "minDcosReleaseVersion": {
          "$ref": "#/definitions/dcosReleaseVersion",
          "description": "The minimum DC/OS Release Version the package can run on."
        }
      },
      "required": [
        "packagingVersion",
        "name",
        "version",
        "maintainer",
        "description",
        "tags"
      ],
      "additionalProperties": false
    }

  },

  "type": "object",
  "oneOf": [
    { "$ref": "#/definitions/v20Package" },
    { "$ref": "#/definitions/v30Package" },
    { "$ref": "#/definitions/v40Package" }
  ]

}