/* pig.js */
define(function(require, exports, module) {
   var Base = require('base');

   var Pig = Base.extend({
       initialize: function(name) {
           this.name = name;
       },
       talk: function() {
           alert('我是' + this.name);
       }
   });

   module.exports = Pig;
});

/* base.js */
define(function(require) {

    var Class = require('class');
    var Events = require('events');
    var Aspect = require('./aspect');
    var Attribute = require('./attribute');

    var Base = Class.create({
        Implements: [Events, Aspect, Attribute],

        initialize: function(config) {
            ...
        },

        ...
    });

    ...
});