{  
	identifier: 'name',
	label: 'name',
	items: [
		{ name:'Africa', type:'continent',
		children:[{_reference:'Egypt'}, {_reference:'Kenya'}, {_reference:'Sudan'}] },
		{ name:'Egypt', type:'stub', parent: 'geography'},
	 	{ name:'Kenya', type:'stub', parent: 'geography'},
	 	{ name:'Sudan', type:'stub', parent: 'geography'},

		{ name:'Asia', type:'continent',
		children:[{_reference:'China'}, {_reference:'India'}, {_reference:'Russia'}, {_reference:'Mongolia'}] },
		{ name:'China',    type:'stub', parent: 'geography'},
	 	{ name:'India',    type:'stub', parent: 'geography'},
		{ name:'Russia',   type:'stub', parent: 'geography'},
		{ name:'Mongolia', type:'stub', parent: 'geography'},

		{ name:'Australia', type:'continent', population:'21 million',
		 children:{_reference:'Commonwealth of Australia'}},
		{ name:'Commonwealth of Australia', type:'stub', parent:'geography'},

		{ name:'Europe', type:'continent',
		children:[{_reference:'Germany'}, {_reference:'France'}, {_reference:'Spain'}, {_reference:'Italy'}] },
		{ name:'Germany', type:'stub', parent: 'geography'},
		{ name:'France',  type:'stub', parent: 'geography'},
		{ name:'Spain',   type:'stub', parent: 'geography'},
		{ name:'Italy',   type:'stub', parent: 'geography'},

		{ name:'North America', type:'continent',
		children:[{_reference:'Mexico'}, {_reference:'Canada'}, {_reference:'United States of America'}] },
		{ name:'Mexico',                   type:'stub', parent: 'geography'},
		{ name:'Canada',                   type:'stub', parent: 'geography'},
		{ name:'United States of America', type:'stub', parent: 'geography'},

		{ name:'South America', type:'continent',
		children:[{_reference:'Brazil'}, {_reference:'Argentina'}] },
		{ name:'Brazil',    type:'stub', parent: 'geography'},
		{ name:'Argentina', type:'stub', parent: 'geography'}
]}