An OLAP cube has a specific set of similar but more restrictive metadata objects derived from the parent cube model, including cube dimensions, cube hierarchies, cube levels, and a cube facts object.

olap多维数据集具有一组特定的、类似但却更多限制性的、衍生自父多维数据集模型的元数据对象，这些对象包括多维数据集维、多维数据集层次结构、多维数据集层和一个多维数据集事实对象。

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A graph as a data model was chosen for SOAP Section 5 encoding because a tree structure is often too restrictive for doing RPC and the encoding was designed to facilitate RPC.

SOAP Seciton 5编码中选择图作为一种数据模型是因为，对于进行RPC而言，树结构常常限制过多，而编码本来就是为了方便rpc而设计的。

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Tasks are the most complex articles for migration: They have the most restrictive content model, and their contents are processed differently based on whether or not the task actually contains steps.

任务是最复杂的迁移类型：内容模型最严格，还要根据任务是否包含步骤而以不同的方式处理内容。

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