{
	"$schema": "http://json-schema.org/draft-07/schema#",
	"$id": "https://www.semantic-mediawiki.org/wiki/Help:Schema/Type/PROPERTY_GROUP_SCHEMA",
	"type": "object",
	"title": "Property group validation schema",
	"required": [
		"type",
		"groups"
	],
	"properties": {
		"type": {
			"$id": "#/properties/type",
			"type": "string",
			"enum": [
				"PROPERTY_GROUP_SCHEMA"
			],
			"title": "Schema type",
			"default": "PROPERTY_GROUP_SCHEMA"
		},
		"title_prefix": {
			"$id": "#/properties/title_prefix",
			"type": "string",
			"enum": [
				"Group"
			],
			"title": "Title prefix"
		},
		"manifest_version": {
			"$id": "#/properties/manifest_version",
			"type": "number",
			"title": "Manifest version",
			"default": 1
		},
		"tags": {
			"$id": "#/properties/tags",
			"type": "array",
			"title": "tags",
			"default": null,
			"items": {
				"$id": "#/properties/tags/items",
				"type": "string",
				"title": "tags, keywords etc.",
				"default": "",
				"pattern": "^(.*)$"
			}
		},
		"groups": {
			"$ref": "#/definitions/groups"
		}
	},
	"definitions": {
		"groups": {
			"$id": "#/definitions/groups",
			"type": "object",
			"title": "Definition of groups",
			"minProperties": 1,
			"patternProperties": {
				"^(.*)_group": {
					"$ref": "#/definitions/group"
				}
			},
			"additionalProperties": false
		},
		"group": {
			"$id": "#/definitions/group",
			"type": "object",
			"title": "Group rules",
			"minProperties": 1,
			"propertyNames": {
				"pattern": "^[A-Za-z_][A-Za-z0-9_]*$"
			},
			"required": [ "property_keys", "canonical_name" ],
			"properties": {
				"message_key": {
					"$ref": "#/definitions/message_key"
				},
				"canonical_name": {
					"$ref": "#/definitions/canonical_name"
				},
				"property_keys": {
					"$ref": "#/definitions/property_keys"
				}
			},
			"additionalProperties": false
		},
		"message_key": {
			"$id": "#/definitions/message_key",
			"type": "string",
			"title": "Group name as message key",
			"default": "",
			"examples": [
				"smw-property-group-label-schema-group"
			],
			"pattern": "^(smw|sar|sesp|sbl|scite|sg)-property-group-label-(.*)$"
		},
		"canonical_name": {
			"$id": "#/definitions/canonical_name",
			"type": "string",
			"title": "Canonical group name",
			"default": "",
			"pattern": "^(.*)$"
		},
		"property_keys": {
			"$id": "#/definitions/property_keys",
			"type": "array",
			"title": "List of properties keys",
			"minItems": 1,
			"items": {
				"type": "string",
				"title": "property",
				"default": "",
				"pattern": "^(.*)$"
			}
		}
	}
}