//Create models with nested attributes
var model = new Backbone.DeepModel({
    id: 123,
    user: {
        type: 'Spy',
        name: {
            first: 'Sterling',
            last: 'Archer'
        }
    }
});

//You can bind to change events on nested attributes
model.bind('change:user.name.first', function(model, val) {
    console.log(val);
});

//Use set with a path name for nested attributes
//NOTE you must you quotation marks around the key name when using a path
model.set({
    'user.name.first': 'Lana',
    'user.name.last':  'Kang'
});

//Use get() with path names so you can create getters later
console.log(model.get('user.type'));    // 'Spy'