The Logical Syntax of Language 语言的逻辑句法
Only after syntax checking is passed, can an XML document be confirmed as well formed and can the logical structure of the document be parsed.
只有语法检查通过之后，才能确认XML文档格式良好并可以解析文档的逻辑结构。
Entities provide a logical name for a specific file that you want to include. The basic syntax of an external entity is.
实体为需要包含的特定文件提供一个逻辑名。
You can also use an XPath syntax to retrieve the contents of a message. The following Java code accesses the first chapter element in the logical tree using the XPath syntax.
您还可以使用xpath语法来检索消息的内容。
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