用于填充和操作数据图的API。
数据图本身就类似XML实例文档。
The data graphs themselves would then be analogous to XML instance documents.
然后返回数据图并由调用客户机进行处理。
The data graph is then returned and processed by the calling client.
中介器层可以接收和返回SDO数据图。
用于记录对数据图的更改的更改摘要api。
A change summary API to record all the changes made to a graph of data.
注意，数据图及其模型总是能够序列化为XML。
Note that data graphs and their models are always serializable to XML.
修改后，数据图被回传给DMS更新数据源。
Once modified, data graphs are passed back to the DMS for updating the data source.
数据图是树形结构或图形结构的数据对象的集合。
A data graph is a collection of tree-structured or graph-structured data objects.
SDO客户机例示了DMS，并从中获得不同雇员的数据图。
The SDO client instantiates a DMS and gets data graphs for various employees from it.
此体系结构允许应用程序主要处理数据图和数据对象。
This architecture allows applications to deal principally with data graphs and data objects.
此外，数据图可以包含表示不同数据源中数据的对象。
Furthermore, a data graph can include objects representing data from different data sources.
当检索数据时，中介器会将库中的数据转换为数据图。
When retrieving data, mediators convert data from the repository into a data graph.
当丢弃对其的客户机引用且未连接到数据图时，会将其自动删除。
They will be deleted for you when you drop your client reference to them, and they are not connected to a data graph.
下面将对伪元数据代码和结果数据图结构进行简要的介绍。
A quick description of the pseudo-metadata code and the resulting data graph structure is provided below.
您应可看出示例文档与模式之间的对应关系，SDO数据图非常清晰。
You should find that the correspondence between the instance document, the schema, and the SDO data graph is clear.
数据图就是一组可以从数据源中分离出来的树形结构的对象。
A data graph is a collection of tree-structured objects that might be disconnected from the data source.
客户机应用程序将查询数据中介服务，并从响应中得到数据图。
Client applications query a data mediator service and get a data graph in response.
此外，由于数据图是由数据对象组成的，因此它是可序列化的。
Moreover, as it is composed of Data Objects, a Data Graph is serializable.
变更摘要包含在数据图中，表示对DMS返回的数据图的修改。
Change summaries are contained by data graphs and are used to represent the changes that have been made to a data graph returned by the DMS.
SDO客户机可以遍历数据图，读取和修改数据图中的数据对象。
SDO clients can traverse a data graph and read and modify its data objects.
通常，运行时提供DAS的实现，而应用程序开发工具提供对数据图的支持。
In general, the runtime provides the implementations of the DASs, and application development tools provide support for the data graphs.
可以将数据图的数据格式(模型)看作DMS与客户机之间的抽象。
The data format (model) of the data graph can be considered a contract between the DMS and the client.
数据对象类型表示原语的分组和其他数据对象类型，是数据图的构建块。
DataObjectTypes represent groupings of primitives and other DataObjectTypes, and are the building blocks of data graphs.
在本例中，数据图由Employee数据对象(以及变更摘要)组成。
For this example, the data graph is made of Employee data objects (and a change summary).
对比一下美国数据图(下面)和日本的数据图(上面)，类似性显而易见。
When you compare the U.S. chart (shown below) with the Japan chart (shown above), the similarities are clearly visible.
例如，可以改为使用另一种能够导入其他工具的输出格式，从而允许绘制历史数据图。
For example, it can be modified to use a different format that can be imported into other tools, for example, to allow the plotting of the historical data.
SDO体系结构中的另一个重要概念是数据图，它是封装一组数据对象的结构。
Another important concept in the SDO architecture is the data graph, a structure that encapsulates a set of data objects.
下面是通过数据图进行迭代的一个简单方法，可以用它指出与图关联的数据部分。
Here is a simple means of iterating through the graph to print out portions of its associated data.
SDO 1.0没有规定DMSAPI, API应该包含数据图模型本身的设计和创建。
SDO 1.0 doesn't specify a DMS API, which would include the design and creation of the data graph model itself.
变更摘要最初是空的（数据图刚返回客户机的时候），随着数据图的变化逐渐填充。
They are initially empty (when the data graph is returned to a client) and populated as the data graph is modified.
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