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

  "title": "ISO 639-2",
  "description": "ISO 639-2 language codes",
  "type": "object",

  "properties": {
	"639-2": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "alpha_3": {
            "description": "Three letter terminology code of the language",
            "type": "string",
            "pattern": "^[a-z]{3}(-[a-z]{3})?$"
          },
          "name": {
            "description": "Name of the item",
            "type": "string",
            "minLength": 1
          },
          "alpha_2": {
            "description": "Two letter alphabetic code of the language from part 1 (optional)",
            "type": "string",
            "pattern": "^[a-z]{2}$"
          },
          "bibliographic": {
            "description": "Three letter bibliographic code of the language (optional)",
            "type": "string",
            "pattern": "^[a-z]{3}$"
          },
          "common_name": {
            "description": "Common name of the language (optional)",
            "type": "string",
            "minLength": 1
          }
        },
        "required": ["alpha_3", "name"],
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}