Chinese Documentation : Defining models

Prerequisites

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A LoopBack model represents data in backend systems such as databases, and by default has both Node and REST APIs.  Additionally, you can add functionality such as validation rules and business logic to models.

Every LoopBack application has a set of predefined built-in models such as User, Role, and Application.  You can extend built-in models to suit your application's needs.   

Additionally, you can define your own custom models specific to your application: