[翻译]ADO.NET Entity Framework Beta2（三）/实体框架入门-白红宇

The ADO.NET Entity Framework is designed to support data-centric applications and services, and provides a platform for programming against data that raises the level of abstraction from the logical relational level to the conceptual level. By enabling developers to work with data at a greater level of abstraction, the Entity Framework supports code that is independent of any particular data storage engine or relational schema.

ADO.NET实体框架被设计成支持以数据为中心的应用程序以及服务，提供了一个基于数据的编码平台，因此提升了从逻辑层到概念层的抽象级别。由于可以支持开发人员在更大的抽象级别上工作，实体框架支持基于任意类型的数据存储引擎或关系构架进行编码。

The Entity Framework supports an Entity Data Model for defining data at both the relational and conceptual level and a mapping between the two. It also enables developers to program directly against the data types defined at the conceptual level as common language runtime (CLR) objects. The Entity Framework provides tools to generate an Entity Data Model (EDM) and the related CLR objects based on an existing database. This reduces much of the data access code that used to be required to create object-based data application and services, and makes it faster to create object-oriented data applications and services from an existing database.

实体框架提供了称为实体数据模型的模型，该模型能在关系以及概念层上定义数据，并且在两者之间定义映射。该模型使得开发人员可以直接基于在概念层上的数据类型定义进行编码，就像操作公共语言运行时对象那样。实体框架提供了若干工具，可以根据一个现有的数据库来生成实体数据模型(EDM)以及相关的CLR对象。这将大大降低在创建基于对象的数据应用程序和服务时通常必须手工编写的用于数据访问代码，以及更快的从一个已经存在的数据库创建面向对象的应用程序以及服务。

The topics in this section are designed to help you understand using the Entity Framework quickly by explaining the underlying technologies in the context of the tutorial.

在本小节内的主题能帮助你快速了解如何使用实体框架，并解释在教程的内容中使用到的技术

In This Section/本节目录

Generating an Entity Data Model/生成实体数据模型

Describes how to derive an EDM from an existing database.

描述如何从现有的数据库生成EDM（实体数据模型）

Mapping a Conceptual Model to a Storage Schema/映射概念模型到存储架构

Describes how the conceptual model is mapped to the storage model.

描述概念模型是如何映射到存储模型的。

Working with Entity Data/使用实体数据工作

Demonstrates how to query an EDM.

阐述如何对EDM进行查询

Quickstart (Entity Framework)/快速入门（实体框架）

A Quickstart tutorial that demonstrates how to create an Entity Framework application.

一个阐述如何建立基于实体框架的应用程序的快速教程

Entity Framework Resources/实体框架资源

A guide to finding information and locating Entity Framework resources.

一个帮助你发现和定位实体框架资源的指南。