The DocumentRoot instance object is the first retrieved, and is the root node used in the operation logic in Listing 8.

所检索到的第一个对象是DocumentRoot实例对象，此对象在清单8中的操作逻辑中作为根节点使用。

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The generated SDO package contains a DocumentRoot class that acts as a root container for all the types that are defined in the schema (Figure 4).

生成的SDO包包含一个DocumentRoot类，该类作为schema中定义的所有类型的根容器（图4）。

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The generated SDO package contains a DocumentRoot class that acts as a root container for all the types that are defined in the schema (Figure 4).

生成的SDO包包含一个DocumentRoot类，该类作为schema中定义的所有类型的根容器（图4）。

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