数据抽象层包含一个类，用于向业务层提供关于位置的信息（请参见图3）。
The Data Abstract Layer consists of a single class to provide location-related data to the business layer (see Figure 3).
从位置数据提供者检索数据，这是一个数据抽象层(DAL)组件，在内存中缓存所有位置。
Data is retrieved from the location Data Provider — a Data Abstract Layer (DAL) component — which caches all locations in memory.
dojo的数据抽象层dojo . data，为dojo提供一个标准API来访问各种后端服务。
Dojo's data abstraction layer, dojo.data, provides a standard API for dojo applications to access a variety of back-end services.
本文中的示例包含数据抽象层（DAL）、数据传输对象（DTO）、业务逻辑层（BLL）、表示层和用于支持的helper类。
The example in this article consists of the Data Abstract Layer (DAL), Data Transfer Objects (DTOs), the Business Logic Layer (BLL), the Presentation Layer, and supporting helper classes.
冗长乏味的JDBC开发导致对象关系映射(ORM)框架的诞生，该框架提供一个数据访问抽象层。
The tedium of JDBC development led to the creation of the object relational mapping (ORM) framework, which provides a data access abstraction layer.
X Forms在表单数据模型及其表示之间增加了一层新的、功能强大的抽象，并提供了在多个不同提交动作之间使用一个表单的能力。
The XForms standard adds a powerful new abstraction between a form's data model and its presentation, as well as providing the ability to use a single form with several different submission actions.
data 提供了一个统一的访问层，它抽象出唯一数据格式的概念。
provides a uniform access layer that abstracts away the concept of unique data formats.
Semantic技术在现有的IT技术之上提供了一层抽象，它跨越业务和IT仓库在数据、内容和过程之间架设了一座桥梁，使其可以相互连接在一起。
Semantic technologies provide an abstraction layer above existing IT technologies, one that enables the bridging and interconnection of data, content, and processes across business and IT silos.
实际上，它需要引入一个抽象层，以允许数据层的更改而不影响服务实现或将这种影响降到最低。
It has to, in effect, introduce a layer of abstraction, allowing for changes in a data layer with no or minimal impact to service implementations.
可以使用业务对象（服务数据对象 (SDO)的扩展）为数据访问提供抽象层。
You can use Business Objects, extensions of Service Data Objects (SDO), to provide an abstraction layer for data access.
PHP的数据库访问是使用PEAR：DB完成的，这是一个方便的数据库抽象层，不管数据库是如何实现的，它都可以使用相同的数据库访问代码。
PHP's database accesses are done using PEAR: : DB, a handy database abstraction layer that allows the same database-access code to be used regardless of what database is implemented.
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.
该体系结构采用了具有抽象层的信息服务，这些抽象层可以最大化应用程序或企业流程与企业数据之间的松散耦合。
This architecture employs information services with abstraction layers that maximize the loose coupling between applications, or enterprise processes, and enterprise data.
这些缓存抽象层不仅适用于GemStone，还适用于其他的数据网格产品。
These caching abstractions will fit with Gemstone and may fit with other data grid products.
使用SQLite和数据库抽象层。
Drupal是在数据库抽象层上编写的，所以框架可以轻松地扩展到其他数据库后端。
Drupal is written on top of a database abstraction layer, so the framework can be easily extended to other database back ends.
Hibernate框架是应用程序调用来实现数据持久性的数据访问抽象层。
The Hibernate framework is a data access abstraction layer that is called by your application for data persistence.
SpringDAO：JDBC DAO抽象层提供了有意义的异常层次结构，可用该结构来管理异常处理和不同数据库供应商抛出的错误消息。
Spring DAO: the Spring JDBC DAO abstraction layer offers a meaningful exception hierarchy for managing the exception handling and error messages thrown by different database vendors.
PEARMDB2包：下载可移植的PEARDB和Metabasephp数据库抽象层的合并包，提供所有受支持RDBMS的通用API。
The PEAR MDB2 package: Download a portable merge of the PEAR DB and Metabase PHP database abstraction layers for a common API for all supported RDBMS.
PDO并不是类似于PearDB的数据库抽象层，而更像一种采用了统一api(应用编程接口)的数据访问层。
PDO is not an abstraction layer like PearDB. PDO is a more like a data access layer which USES a unified API (Application Programming Interface).
本系列中的下一篇文章描述Drupal数据库抽象层，以及如何使用DB 2 Express- c替代mysql或PostgreSQL。
The next article in this series describes the Drupal database abstraction layer, and how DB2 Express-C could be used as an alternative to MySQL or PostgreSQL.
大部分读者可能发现它们处于这样的境地——他们已经有了大量运行于其他数据库抽象层的程序。
Most readers probably find themselves in a position where they already have a number of applications that run on some other database abstraction layer.
如前面所说，文章的焦点是介绍使得MDB与其他PHP数据库抽象层不同的那些特性。
As stated earlier, the focus of the article is to introduce the features that set MDB apart from other database abstraction layers for PHP.
利用程序抽象技术，以信息隐藏为基本手段，通过建立抽象数据层，探索出一条提高MIS软件质量的技术方法。
Taking message hiding as a basic method, a technique that can improve the quality of MIS software is figured out by means of program abstracting and setting up abstract data layer.
大部分其他的PHP的所谓数据库抽象层紧紧给所有支持的数据库提供了一个公用api以及非常有限的抽象(大部分只是针对序列的)。
Most other so called database abstraction layers for PHP only provide a common API for all supported databases and only very limited abstraction (mostly only for sequences).
该系统提供了表示层对数据文件抽象语法表示的支持及数据语法的转换，从而达到了数据文件共享的目的。
This system provides a support of presentation layer to the data file abstract syntax notation and the data grammatical conversion in order to achieve one's object of the sharing of data files.
PDO提供了一个数据访问抽象层，这就意味着，不管你使用的是哪种数据库，你都可以用同样的函数去进行查询的获取数据。
PDO provides a data-access abstraction layer, which means that, regardless of which database you're using, you use the same functions to issue queries and fetch data.
依据实际业务中对数据的操作要求，并对数据和操作进行封装和抽象，产生业务逻辑层的类及其类层次结构。实现对业务逻辑层的设计。
It gives the classes and hierarchical structure of them and the implementation of the design of logic layer, according to data and operation of practical business and encapsulation and abstract.
依据实际业务中对数据的操作要求，并对数据和操作进行封装和抽象，产生业务逻辑层的类及其类层次结构。实现对业务逻辑层的设计。
It gives the classes and hierarchical structure of them and the implementation of the design of logic layer, according to data and operation of practical business and encapsulation and abstract.
应用推荐