将元数据定义保存到 DataStage 中
数据定义语言(DDL)语句是不能回滚的语句。
Data definition language (DDL) statements are not statements that can be rolled back.
写得不好的用例常有塞满了数据定义的事件流程。
Poorly written use cases often have flows of events that are packed full of data definitions. Consider this basic flow of events for a use case called Manage Purchase request.
元数据定义(数据模型)过于松散，指定不一致。
Metadata definitions (data models) are too loosely and not consistently specified.
类型树是定义输入和输出数据的格式的数据定义文件。
Type Trees are the data definition files that define the format of the input and output data.
DSC的任务是确保基于语义数据定义的服务互操作性。
The DSC’s mission is to ensure service interoperability based on semantic data definition.
根据更好的元数据定义减少返回数据(使用外部表)。
Reduction of return data based on better definition of metadata (using External tables).
这个元数据定义先决条件、适当的模块名称和其他信息。
This metadata defines prerequisites, the proper name of the module, and more.
现有服务或数据定义被导入到Modeler中，以供重用。
Existing services or data definitions are imported into Modeler for reuse.
使用系统中的元数据定义这些安全策略，客户不需要开发它们。
These security policies are defined using the master data in the system. The policies require no customer development.
需要将传输到流程的数据定义为一系列简单的数据类型(图6)。
The data flowing into the process needs to be defined as a series of simple data types (Figure 6).
要遍历这些数据，你必须了解程序所采用的特定的数据定义。
To traverse this data, one needs to be aware of the specific schema employed by the application.
为了实现归类，需要获得存储库中放入的每个构件的元数据定义。
Implementation of cataloging requires definition of the metadata for every artifact placed in the repository.
语义谱描述了用于创建越来越精确的数据定义的一系列技术和方法。
Semantic spectrum describes a series of technologies and methodologies for creating increasingly precise definitions for data.
你需要在数据定义视图中展开项目文件夹，以看到新创建的数据库。
You need to expand the project folder in the data definition view to see the newly created database.
XDR为数据定义一个标准的表示来支持异构网络应用程序通信的开发。
XDR defined a standard representation for data to support the development of communicating heterogeneous network applications.
数据质量对业务决策的影响可能出现在数据定义的技术层面和业务层面。
Poor data quality's effect on the ability to make sound business decisions can be found both at the technical level and the business level of data definition.
一种常见的定义数据的方法是通过继承——使用现有的数据定义并添加参数。
A common approach to defining data is through inheritance - taking an existing data definition and adding parameters.
还可以根据请求参数或其他应用程序元数据定义缓存动态内容的缓存规则。
You can also define caching rules for caching dynamic content based on request parameters or other application metadata.
从flat文件或者XML模式中导入数据定义，以便在您的业务流程中使用。
Import data definitions from a flat file or from an XML schema, for use in your business processes.
SQL有两个主要部分：数据定义语言(DDL)和数据操纵语言(DML)。
SQL has two main components: a Data Definition Language (DDL) and a Data Manipulation Language (DML).
这个表也很简单，在SQL中创建结构使用的数据定义语言(DDL)如清单4所示。
It's also pretty simple, and the data definition language (DDL), which is the language you use to create structures in SQL, is in Listing 4.
LOM定义了一个基本模式，这个模式为学习对象元数据定义了数据元素的层次结构。
LOM defines a Base schema that defines a hierarchy of data elements for learning objects metadata.
还可以对实际数据库或数据定义语言(DDL)文件进行反向工程，生成物理数据模型。
Even still, with physical data models you can reverse engineer from the actual database or from the data definition language (DDL) file.
如果一个数据源中的数据定义被更改，对其他系统的影响就会加倍，而且通常很难预测。
If data definition in one data source is changed, the impact to other systems is multiplied and often unpredictable.
您可以参考清单1中的数据定义语言（DDL）语句，为样例应用程序创建数据库和表。
You can refer to the Data Definition Language (DDL) statements in Listing 1 to create the database and table for the sample application.
根据创建数据库所使用的数据定义语言 (DDL)模式文件，可以确定正在使用的锁类型。
You can determine the types of locks being used from the Data Definition Language (DDL) schema files used to create the database.
复制队列映射链接源系统上的发送队列和目标系统上的接收队列，以便为复制数据定义一条通道。
A replication queue map links the send queue at the source and the receive queue at the target to define a pathway for replicating data.
这样就可以在分类过程中应用业务逻辑，业务逻辑往往是通过元数据定义的外部非统计性信息。
This way you can effectively apply business logic, external non-statistical information usually defined through metadata, in the classification process.
导入系统数据：包含预定义数据定义的系统工具包被添加到数据库，以供各种流程应用程序使用。
Imports the system data: the system toolkit that contains the predefined data definitions are added to the database to be used by the various process applications.
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