{
  "$schema": "http://json-schema.org/schema#",
  "title": "xAAL Schema Definition",
  "description": "General form of an xAAL schema",
  "license": "LGPLv3+ Christophe Lohr Telecom Bretagne 2014",
  "licenseref": "http://www.gnu.org/licenses/lgpl.txt",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*.[a-zA-Z][a-zA-Z0-9_-]*$"
    },
    "version": {
      "type": "number",
      "minimum": 0
    },
    "description": {
      "type": "string"
    },
    "lang": {
      "type": "string"
    },
    "documentation": {
      "type": "string",
      "format": "uri"
    },
    "ref": {
      "type": "string",
      "format": "uri"
    },
    "license": {
      "type": "string"
    },
    "licenseref": {
      "type": "string",
      "format": "uri"  
    },
    "extends": {
      "type": "string",
      "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*.[a-zA-Z][a-zA-Z0-9_-]*$"
    },
    "internalVariables": {
      "type": "array",
      "items": { "$ref": "#/definitions/variable" },
      "additionalItems": false,
      "uniqueItems": true
    },
    "stateVariables": {
      "type": "array",
      "items": { "$ref": "#/definitions/variable" },
      "additionalItems": false,
      "uniqueItems": true
    },
    "methods": { 
      "type": "array",
      "items": { "$ref": "#/definitions/method" },
      "additionalItems": false,
      "uniqueItems": true
    },
    "notifications": {
      "type": "array",
      "items": { "$ref": "#/definitions/notification" },
      "additionalItems": false,
      "uniqueItems": true
    }
  },
  "required": [ "name", "version", "description", "lang", "documentation", "ref" ],
  "additionalProperties": false,
  "definitions": {
    "variable": {
      "type": "object",
      "properties": {
	"name": {
	  "type": "string",
	  "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*$"
	},
	"description": {
	  "type": "string"
	},
	"unit" : {
	  "type": "string"
	},
	"type": { 
	  "$ref": "http://json-schema.org/schema#"
        }
      },
      "additionalProperties": false,
      "required": [ "name", "description", "unit", "type" ]
    },
    "parameter": {
      "type": "object",
      "properties": {
	"name": {
	  "type": "string",
	  "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*$"
	},
	"description": {
	  "type": "string"
	},
	"unit" : {
	  "type": "string"
	},
        "type": { 
          "$ref": "http://json-schema.org/schema#"  
        },
        "direction": {
          "enum": [ "in", "out", "inout" ]
        }
      },
      "additionalProperties": false,
      "required": [ "name", "description", "unit", "direction", "type" ]
    },
    "method": {
      "type": "object",
      "properties": {
	"name": {
	  "type": "string",
	  "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*$"
	},
	"description": {
	  "type": "string"
	},
	"parameters": {
	  "type": "array",
          "items": { "$ref": "#/definitions/parameter" },
          "additionalItems": false,
          "uniqueItems": true
	}
      },
      "required": [ "name", "description", "parameters" ]
    },
    "notification": {
      "type": "object",
      "properties": {
	"name": {
	  "type": "string",
	  "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*$"
	},
	"description": {
	  "type": "string"
	},
	"parameters": {
          "type": "array",
          "items": { "$ref": "#/definitions/variable" },
          "additionalItems": false,
          "uniqueItems": true
	}
      },
      "required": [ "name", "description", "parameters" ]
    }
  }
}