数据可以从数据源加载(使用数据访问服务)或动态创建。
The data may be loaded from a data source (using a data Access Service) or created dynamically.
此方法由公共语言运行时 （CLR）数据访问服务调用。
This method is called by the common language runtime (CLR) data access services.
数据访问服务基于授权和限制(策略和访问规则)来提供或阻止数据访问。
Data access services provide or prevent access to data based on authorizations and restrictions (policies and rules for access).
如果需要最高的性能，通常可以将数据访问服务作为数据库存储过程实现。
If the highest performance is needed, the data access service can often be implemented as a database stored procedure.
将数据操作逻辑放入到数据访问服务或过程中可减少业务逻辑对数据源的依赖性。
Placing the data manipulation logic into a data access service or procedure makes the business logic less dependent on the source of the data.
为实现分布式协作开发环境下工具间的数据共享，应当提供一致的数据访问服务。
Under the distributed collaborative development environment, a kind of unified access service of data is required to fulfill data sharing among tools.
使用虚拟数据访问服务层支持SOA、促进代码重用、提高编程效率和促成更灵活的软件环境。
Support SOA, promote code reuse, enhance programming productivity, and contribute to a more flexible software environment with the virtual data access services layer.
数据访问服务遵循相应的API描述，因此第三方可以为任何数据源编写自己的数据访问服务。
The data Access Service follows an API description such that third parties can write their own data Access Services to any data source.
结果这类系统可用性差，有的甚至在备份之前要人为中止文件系统的数据访问服务，致使用户使用不便。
These above result in the low availability of these backup systems and cause the systems are hard to use by user.
它访问一个叫做数据访问服务(dataaccess service,DAS)的中介并接收响应中的数据图。
Instead, it accesses an intermediary called a data access service (DAS) and receives a data graph in response.
如图4中所示，该中介使用DB 2 Information Integrator为SDO应用程序构建了一个虚拟数据访问服务层。
As shown in the Figure 4, this mediator works with WebSphere Information Integrator to form a virtual data access services layer for SDO applications.
将应用程序连接到数据源的任务是通过数据访问服务(Data Access Service,DAS)执行的(参见图1)。
The task of connecting applications to data sources is performed by a data Access Service (DAS) (see Figure 1).
HSDA服务器是一个遵循iec 61970 HSDA规范的服务器，在EMS等系统中，它主要扮演着实时数据发布者的角色，对外提供高速数据访问服务。
HSDA Server is a kind of EMS Server. It conforms to IEC 61970 HSDA standard, provides high speed data access service, and plays a major role of publishing real-time data in EMS system.
这是一个复杂的系统，数据被复制到多个中间设备，通常是为了在数百万人同时试图访问服务时加快文件访问速度。
It's a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time.
然后，可以在企业之间和企业外部访问这个实现了车辆数据访问的服务。
The service that implements access to vehicle data can then be Shared across and beyond the enterprise.
这些代理提供远程端点，工作台使用该端点通信以访问数据收集服务。
These agents provide a remote endpoint with which the workbenches communicate to access the data collection services.
这样，您就不必让数据库停止服务，您的用户仍可以访问数据。
That way, you do not have to bring the database down, and data is still accessible to your users.
KPI数据模型包含用于访问KPI服务的实用常量。
The KPI data model contains useful constants that are used in accessing the KPI service.
标识为Monitor数据访问提供url的服务端点。
Identifies the service endpoint that provides the URL for Monitor data access.
在此基础上，Spring2.5又加入了两个新的注解 —— @Service和@Controller来完成为通常的三层架构（数据访问对象、服务、web控制器）角色委任。
Spring 2.5 adds two new annotations - @Service and @Controller - to complete the role designations for a common three-tier architecture (data access objects, services, and web controllers).
本文中的示例使用EXPathHTTPClient库访问远程数据和web服务。
The examples in this article use the EXPath HTTP Client library to access remote data and web services.
服务中访问的数据库表应该没有被更新。
The database table accessed in the service should not be updated.
举个例子来说，这种机制可以用在外部配置过程的数据库访问或者服务调用地址。
This mechanism can be used, for example, to externally configure process's database access or service invocation address.
还可以通过在多个数据服务器上分段数据进行并行访问来增强性能。
Performance can also be enhanced by striping the data over multiple data servers for parallel access.
它促进称为服务元数据的服务信息的存储、访问和管理，以便您能够轻松选择、调用、治理和重用您的服务。
It facilitates storing, accessing and managing service information, called service metadata, so that you can easily select, invoke, govern and reuse your services.
它还与控件进行数据绑定，并访问服务器端数据。
It also does data binding with controls, and accesses server-side data.
DB 2UDB提供了多个工具，可以用于监控数据库服务器的活动，或分析sql语句如何访问数据；每个工具都服务于不同的目的。
DB2 UDB provides several tools that can be used to monitor database server activities, or to analyze how an SQL statement accesses data; each serves a different purpose.
对于进程地址空间中的用户数据，必须使用内核服务进行访问。
User data within the process address space must be accessed using kernel services.
客户机获得授权和布局之后，就可以直接从数据服务器访问信息。
When authorized and given the layout, the client is free to access information from the data servers directly.
这个新的JDBC通用驱动程序可用于跨db2数据库服务器系列访问数据。
This new JDBC Universal Driver can be used to access data across the DB2 family of database servers.
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