You can use global elements as root nodes and can reference them from other parts of the schema.

您可以使用全局元素作为根节点，并且可以从模式的其他部分引用它们。

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The rootNodes element under ClassificationTaxonomy represents a list of classes that constitute the root nodes of the classification hierarchy.

ClassificationTaxonomy 下的 rootNodes 元素表示构成该分类层次结构的根节点的分类列表。

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A FOT index is an index that is similar to a B-Tree index, but an FOT index has multiple root nodes and fewer levels. (B-Tree indexes have only one root node and more levels.)

FOT索引类似B - Tree索引，但它有多个根节点和较少的级(B - Tree索引只有一个根节点和更多的级)。

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