本文论述了使用XMLDTD建模技术，分别建立各个异构数据源连接信息模型与元数据映射模型的方法。
The article expatiates on a method of establishing heterogeneous data sources to connect the information model and the metadata mapping model by using the XML DTD modeling technique.
有时候，已经存在一个bean类，其中包含所有需要的关系映射元数据，但是这个类所映射的底层物理表却丢失了。
There are also instances when a given bean class with all the required relational mapping meta-data exists, but the underlying physical tables to which it is mapped are missing.
基于元数据的映射方法证实是PetStore应用程序更加节省时间的方法。
The metadata-based mapping approach proved to be more time-efficient for the PetStore application.
Ceph使用一个有趣的备选，而不是依赖分配列表(将磁盘上的块映射到指定文件的元数据)。
Rather than rely on allocation lists (metadata to map blocks on a disk to a given file), Ceph USES an interesting alternative.
您可以修改映射元数据文件(本技巧没有详述映射元数据文件的细节)。
You could modify the mapping metadata file (this tip does not go into details on the mapping metadata file).
描述符也可以提供与注释相同的有关实体的元数据信息，如主键字段，以及对象之间的任何映射。
The descriptor can also provide the same metadata information about the entities as annotations, such as primary key field, and any mappings between objects.
文档定义可以从其它文档继承定义的信息，这允许您定义XML内容到RD f元数据信息的复杂映射。
Document definitions can inherit information from other document definitions allowing you to define a complex mapping of XML content to RDF metadata information.
正如您在阅读上篇文章后可以想象的那样，描述这些关系的元数据现在也可以用与存储属性列映射相同的方法存储在XML文件中。
As you can imagine from reading the preceding article, the metadata that describes these relationships is now also stored in XML files in the same way that attribute-column mappings are stored.
为了使性能最大化和更加便利，目前的策略是从某一个表中提出元数据，先把一个类的实例映射到那个表上，用来初始化。
The current strategy for maximizing performance and convenience is to retrieve metadata for a particular table the first time an instance of the class that maps to that table is instantiated.
这样一来，放置组(以及副本)到存储设备的映射就不用依赖任何元数据，而是依赖一个伪随机的映射函数。
In this way, mapping of placement groups (and replicas) to storage devices does not rely on any metadata but instead on a pseudo-random mapping function.
包包含用于把数据源的技术对象映射到可在报告和分析中使用的对象的元数据。
Packages contain the metadata to map technical objects of a data source to objects usable in reports and analyses.
要查看完整的映射元数据文件，请参见参考资料部分中所包括的EAR文件。
To see the complete mapping meta-data file, see the included EAR file in the Resources section.
在4ss的XML资源库中，文档定义允许您指定XML内容和RD f元数据之间的一个映射。
In 4ss's XML repository, document definitions allow you to specify a mapping between XML content and RDF metadata.
您还可以提供XMl元数据作为映射注释的覆盖或备选机制。
You can also provide XML metadata as an overriding or alternative mechanism to the mapped annotations.
这允许在外部维护扩展映射，并且只要有必要，就可以将新的映射版本导入到元数据库。
This allows for the extension mappings to be maintained externally, and whenever desired, the new version of the mappings can be imported into the metadata repository.
元数据模型用来定义EPCIS事件以及它们到底层数据库模式的映射。
The metadata model is used to define EPCIS events and their mapping to the underlying database schema.
采用这种统一的视图，我们就可以精确地检索信息，无缝地进行企业系统集成，因为业务处理过程和各种数据源都可以通过一种通用的元数据模型相互进行映射。
This unified view allows for precise retrieval of information and seamless enterprise integration, as business processes and various data sources can map to each other through a common meta-model.
现在，让我们将目光投向客户端元数据，这种元数据用一些附加扩展映射CWM客户端模型。
For now, let's focus on client-side metadata, which mirrors the CWM client-side model with some additional extensions.
正如前面所述，有两种定义映射的方法：元数据(注释)和映射文件。
As I mentioned earlier, you have two ways to define the mapping: metadata (annotations) and a mapping file.
元数据——由于有着逻辑与物理位置之间的映射关系，因此对于一个运行的可靠系统来说存储元数据的管理显得极为关键。
Metadata – Since there is a mapping between logical and physical location, the storage metadata and its management becomes key to a working reliable system.
但是有许多问题无法通过映射元数据文件解决。
But there are a number of problems that cannot be solved by the mapping meta-data file.
如果您想要改变标准JAX - RPC映射规则中的映射的话，您可以修改映射元数据文件。
If you want to change the mappings from the standard JAX-RPC mapping rules, you can modify the mapping meta-data file.
它使用原始类的自身来代替映射元数据文件。
It USES introspection of the original classes in place of a mapping meta-data file.
该工具用于更新存储在IIS元数据根目录下的脚本映射。
The utility works by updating the script maps stored in the IIS metabase root and below.
OSEM允许制定不同的转换器，一个类属性对应多个元数据(从资源到属性的映射)、分析器和所有参与的字段，等等。
OSEM allows to specify custom converters, multiple meta-data (maps to Resource property) per class property, analyzers, 'all' field participation, and many more.
在不同元数据源之间进行自动发现、映射和转换对改进元数据的可管理性都是非常重要。
Automatic discovery, mapping, and transformation among diverse metadata sources are critical to improve metadata manageability.
这里关键的一点是WebSphere需要EJB部署描述符之外的额外元数据来执行这些映射。
The key point here is that WebSphere requires additional metadata beyond the EJB deployment descriptor to perform these mappings.
GBO格式将会是一个包罗万象的格式，任何应用程序的医疗schema和元数据都能映射到 GBO 格式。
The GBO format would be an all encompassing format that would allow any exchange of the application healthcare schema and its metadata to be mapped to it.
最后，还需要用一个新的装配器从映射文件中提取mbeaninfo元数据。
Finally, I'll need to use a new assembler to fetch MBeanInfo metadata from my mapping files.
为对象-关系映射创建XM l元数据。
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