XPath 2 schema-related node tests.
与XPath 2模式相关的节点测试。
It also allows schema-element and schema-attribute node tests.
也允许schema - element和schema - attribute节点测试。
The detailed syntax and semantics of the node tests can be found in the XPath 2 specification in Resources.
详细的节点测试语法和语义参见参考资料中的XPath 2规范。
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