The predicates work like this: for each node, the engine processes the predicate using that context.
谓词的工作原理类似于：对于每个节点，引擎使用上下文处理谓词。
For example, you might select a node and then drill down to add a predicate.
例如，您可以选择一个节点，然后钻取到查询中添加一个谓词。
In general, an element node is the parent of a text node; but here, the predicate essentially de-references the text within an element.
一般来说，元素节点是文本节点的父节点，但这里谓词实际上引用了元素中的文本。
The IXSCAN node detailed description shows that all of the 1,680 leaf pages are scanned due to the lack of a matching predicate.
由于缺乏匹配的谓词，IXSCAN节点详细描述显示所有被扫描的1,680个叶级页。
A predicate must be applied to a node set, but it can be applied to any node set.
谓词必须作用于节点集，但是可作用于任何节点集。
Remember, a predicate applies to the node set to the left of the predicate itself.
要记住，谓词作用于谓词本身左侧的节点集。
It is not necessary to apply this predicate explicitly to every element to see if it is true, since processing can stop after the third node.
没有必要对每个元素应用该谓词来查看它是否是真，因为处理可能在第三个节点后停止。
A predicate is a partial expression that can be applied to an existing node set.
谓词是用于已有节点集的部分表达式。
The detailed description of the FETCH node shows that 18,515.602 records are estimated to survive the stage-1 predicate.
FETCH节点的详细描述显示估计有18,515.602条记录存在阶段1谓词。
Then, the attributes of each node named "style" are isolated using the partial predicate @style.
然后使用谓词 @style 取出每个节点的 “style”属性。
Then, the attributes of each node named "style" are isolated using the partial predicate @style.
然后使用谓词 @style 取出每个节点的 “style”属性。
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