Name: voting
Elements:
	id: { readonly: true, type: string }
	event_id: { readonly: true, type: string }
	created_on: { readonly: true, type: timestamp }
	created_by: { readonly: true, type: string }
	modified_on: { readonly: true, type: timestamp }
	modified_by: { readonly: true, type: string }
	status: { readonly: true, type: enum, values: [ 'idle', 'open', 'closed', 'finished' ] }
	name: { required: true, type: string, max_length: 64 }
	title: { required: true, type: string, max_length: 64 }
	type: { required: true, type: string, min_length: 3, max_length: 64 }
	options: { type: list, item_type: object, item_class: voting_option, max_count: 99 }
	period_start: { type: timestamp }
	period_end: { type: timestamp }
	non_anonymous: { type: bool, default: false }
	client_data: { type: string, max_length: 4096 }