A cyclic object graph cannot be transformed into a tree structure.
一个循环对象图不能够转换为树结构。
A data object structure represents a graph that, in addition to hosting member elements, encapsulates references to type and usage metadata about each of these elements.
一个数据对象架构代表了一个图，除了成员元素，它还封装了对关于每一个元素类型及使用元数据的引用。
The Data Object Graph is the hierarchical structure of data. It contains a tree of Data Objects and another structure called the Change Summary (see Figure 4).
数据对象图是一个描述数据的分层结构，它包括一个数据对象树和另一个称作更改摘要 (Change Summary) 的结构（请参阅 图 4）。
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