The following query explicitly casts both sides of the join predicate to DOUBLE.
以下查询明确地将连接谓词的两端转换为DOUBLE。
As you see in Table 3, a string predicate can only be evaluated with an XML index of type VARCHAR, while a numeric predicate can only be evaluated with an index of type DOUBLE.
正如您在表3中所看到的，字符串谓词只能由varchar类型的xml索引进行计算，而数值谓词只能由double类型的索引进行计算。
If the XML index is defined as double, you cast the join predicate with xs: double.
如果将xml索引定义为double，则用xs： double转换连接谓词。
If you use double quotes around your string-based query predicate, instead of pairs of single quotes, you'll get a syntax error.
如果在基于字符串的查询谓词周围使用双引号，而不是单引号，就会收到语法错误。
However, a slash or a double slash ( / or // ) at the front of a predicate in square brackets does not have a context and therefore refers to the root of the document.
但是，方括号中谓词前的单斜线或双斜线（/ 或 //）没有上下文，所以引用到文档的根。
Analyze this sentence. Draw a line under the subject, a double line under predicate, a wavy line under the attribute, and a dotted line under the adverbial.
分析这个句子。在主语下划横线，在谓语下划两道横线，在定语下划曲线，在状语下划虚线。
Analyze this sentence. Draw a line under the subject, a double line under the predicate, a wavy line under the attribute, and a dotted line under the adverbial.
分析这个句子。在主语下划道横线，在谓语下划两道横线，在定语下划曲线，在状语下划虚线。
Draw a line under the subject, a double line under the predicate, a wavy line under the attribute, and a dotted line under the adverbial.
在主语下划道横线，在谓语下划两道横线，在定语下划曲线，在状语下划虚线。
Draw a line under the subject, a double line under the predicate, a wavy line under the attribute, and a dotted line under the adverbial.
在主语下划道横线，在谓语下划两道横线，在定语下划曲线，在状语下划虚线。
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