ExtJs 3
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The data package is what loads and saves all of the data in your application and consists of 41 classes, but there are three that are more important than all the others - Model, Store and Ext.data.proxy.Proxy. These are used by almost every application, and are supported by a number of satellite classes:
Models and Stores
The centerpiece of the data package is Ext.data.Model. A Model represents some type of data in an application - for example an e-commerce app might have models for Users, Products and Orders. At its simplest a Model is just a set of fields and their data. We’re going to look at four of the principal parts of Model — Fields, Proxies, Associations and Validations.
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