Such.assign("city", { 
  "US": { 
    "Alaska": [ 
      "Los Angeles", 
      "San Diego", 
      "San Francisco" 
    ] 
  }, 
  "UK": { 
    "England": [ 
      "London", 
      "Bath", 
      "York" 
    ] 
  }, 
  "Italy": { 
    "Lombardy": [ 
      "Milan", 
      "Brescia", 
      "Monza" 
    ] 
  } 
}); 
Such.as({ 
  country: ":cascader:#[data=city]", 
  state: ":cascader:&./country", 
  city:":cascader:&./state" 
});