What is the data access layer implemented with?
数据访问层使用什么实现？
In the process, it also interacts with the data access layer.
在运行过程中，它还会与数据访问层进行交互。
This is the middle tier and ACTS between the GUI and the Data access layer.
这是中间层之间的界面和数据访问层的行为。
Once database schema is changed, user only re-generates the data access layer easily.
一旦数据库发生变更，用户只需重新生成数据访问层即可。
The data access layer provides a semantic data store, a user profile, and the rules database.
数据访问层提供了一种语义数据存储、一个用户个人文件以及规则数据库。
Finally, the data access layer is a persistent data store, such as a database or file storage.
最后，数据访问层是持久化的数据存储，比如数据库或文件存储。
The Business Logic Layer, in turn, requests that the data Access Layer deal with data persistence.
而业务逻辑层则请求数据访问层处理数据持久性。
The business layer generally interacts with the information system through the data access layer.
业务层主要通过数据访问层与信息系统实现交互。
The data Access Layer utilizes WPF data binding to tie UI components to business logic or data components.
数据接口层(Data Access Layer)利用WPF实现UI组件对业务逻辑和数据组件的绑定。
If you change the database structure, you need to accordingly change the data access layer, view layer.
如果改变了数据库结构，就需要相应地改变数据访问层、视图层等。
Figure 1: the BLL Separates the Presentation Layer from the Data Access Layer and Imposes Business rules.
图一：BLL将表示层与DAL隔开了，并且加入了业务规则。
The data access layer is responsible retrieving and manipulating data stored in enterprise information systems (EISs).
数据访问层负责对存储在企业信息系统(EIS)中的数据进行存取等操作。
These underlying data access calls are thus consolidated in the data access layer and hidden from the business logic.
这些底层数据调用整合到数据访问层中，对于业务逻辑是不可见的。
The Business Layer does not have any direct communication with the database - this is all handled by the Data Access Layer.
业务层和数据库没有任何通讯-这些有数据访问层处理。
The service implementation class USES the data access layer directly (ServiceRegistryRepository class) for execution of service.
Service的实现类直接使用数据访问层(serviceregistryrepository类)来执行服务。
The data access layer can also act as an integration point to link with other systems, including being a client of other Web services.
数据访问层还可以作为连接其他系统的集成点，可以成为其他Web服务的客户端。
Spring framework is used to tie together the components in the Data Access Layer, the Business Logic Layer, and the Presentation Layer.
Spring框架用于将数据访问层、业务逻辑层和表示层中的各组件结合在一起。
This is a specific implementation of the Repository class for Service Registry, which provides the primary interface to the data access layer.
这个类是服务注册中心Repository类的一个具体实现，它为数据访问层提供了基础的接口。
As illustrated in Figure 16, this object passes the necessary data to the BLL, which then requests the data Access Layer to save the data to MySQL database.
如图16所示，此对象将必要的数据传递给BLL，后者随后请求数据访问层将数据保存到MySQL数据库。
We had properly isolated the data access layer, simplifying the optimization of queries (which had sometimes snuck into the business logic on previous projects).
我们适当的将数据访问进行了分层，简化了查询的优化（在之前的项目中数据访问有时会混合在业务逻辑中）。
This is where all business rules are applied as data passes from the Presentation Layer (UI), through the business Layer to the data Access Layer, and back again.
当数据从表示层(ui)传递过来的时候，全部的业务规则都在这里执行，通过业务层到数据访问层，然后再倒过来。
Business rules are centralized into the business logic layer that serves as an intermediary for data exchange between the presentation layer and the data access layer.
业务规则可以集中到业务逻辑层，该层充当表示层和数据访问层之间的数据交换的中间层。
Developers must write code to implement the data access layer, including optimizing SQL queries, caching results to optimize performance, without compromising an application's footprint.
开发人员必须编写代码来实现数据访问层，包括优化SQL查询、缓存结果以优化性能，而不会损害应用程序的规模。
PureQuery API will still be used to provide the data access layer, but it will return the data rows "as is" to the application, in the form of an Employee object with two variables: id and doc.
仍然使用pureQueryAPI提供数据访问层，但是它把数据行“按原样”返回给应用程序，也就是包含两个变量(id和doc)的Employee对象。
The power of this layer is in separating data access code from the business logic for disparate data store technologies.
该层的作用在于针对不同的数据存储技术，从业务逻辑中分离数据访问代码。
For quick prototyping efforts it is acceptable to combine the database access in the view layer, compromising the strict separation of data from view.
为了快速开发原型，将数据库访问合并到视图层，打破数据与视图严格分离的限制，这是可以接受的。
Again, if a data access layer is used, the code can be consolidated there and hidden from the using application.
同样，如果使用数据访问层，代码将整合到其中，对于使用的应用程序是不可见的。
Enterprise data services effectively create abstraction layer, shielding business functionality from the data access details.
企业数据服务有效地创建了一个抽象层，使业务功能避开数据存取细节。
Enterprise data services effectively create abstraction layer, shielding business functionality from the data access details.
企业数据服务有效地创建了一个抽象层，使业务功能避开数据存取细节。
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