XML中的元素和节点之间有什么区别？

Question

我正在用Java工作,我很想知道; 元素和节点之间有什么区别？

Answer 1

Node对象是整个DOM的主要数据类型.

节点可以是元素节点,属性节点,文本节点或"节点类型"一章中解释的任何其他节点类型.

XML元素是从(包括)元素的开始标记到(包括)元素的结束标记的所有内容.

Answer 2

不同的W3C规范定义了不同的"节点"类型集.

因此,DOM规范定义了以下类型的节点:

• An element is a type of node. Many other types of nodes exist and serve different purposes.- An element is a type of node. Many other types of nodes exist and serve different purposes.(最大的一个的), ,,An element is a type of node. Many other types of nodes exist and serve different purposes. An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes. - ,An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes., An element is a type of node. Many other types of nodes exist and serve different purposes.,,An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩
• An element is a type of node. Many other types of nodes exist and serve different purposes. - ,An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes., An element is a type of node. Many other types of nodes exist and serve different purposes.,,An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes.- ,An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes.,,An element is a type of node. Many other types of nodes exist and serve different purposes. An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes.- An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩
• An element is a type of node. Many other types of nodes exist and serve different purposes.- ,An element is a type of node. Many other types of nodes exist and serve different purposes.,An element is a type of node. Many other types of nodes exist and serve different purposes., An element is a type of node. Many other types of nodes exist and serve different purposes.,,An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.An element is a type of node. Many other types of nodes exist and serve different purposes.
• An element is a type of node. Many other types of nodes exist and serve different purposes. - 没有小孩

的XML信息集(通过XPath的使用)具有一组更小的节点的:

文件信息项

元素信息项

属性信息项

处理指令信息项

未扩展的实体参考信息项

字符信息项

评论信息项目

文件类型声明信息项

未分析的实体信息项

符号信息项

命名空间信息项

XPath具有以下节点类型:

• 根节点
• 元素节点
• 文本节点
• 属性节点
• 命名空间节点
• 处理指令节点
• 评论节点

您的问题 " 元素和节点之间的区别是什么 " 的答案是:

An element is a type of node. Many other types of nodes exist and serve different purposes.

Answer 3

Node是DOM树的一部分,Element是特定类型的Node

例如 <foo> This is Text </foo>

你有一个foo元素(也是一个Node,因为Element继承自Node)和一个文本节点'This is Text',它是foo元素/节点的子节点

Answer 4

节点可以是许多不同类型的东西:一些文本,一个注释,一个元素,一个实体等.元素是一种特殊的节点.

Answer 5

如各种XML 规范中所述,a element是由开始标记和结束标记以及其间的内容组成的,或者是空元素标记(没有内容或结束标记).换句话说,这些都是元素:

<foo> stuff </foo>
<foo bar="baz"></foo>
<foo baz="qux" />

虽然您听到的"节点"使用的含义大致相同,但每个XML规范都没有精确的定义.它通常用于指代DOM之类的节点,这些节点可能与XML密切相关或使用XML进行表示.

Answer 6

xml文档由嵌套元素组成.元素从其开始标记开始,以其结束标记结束.你可能看到的<body>和</body>在HTML中.开始标记和结束标记之间的所有内容都是元素的内容.如果元素由自闭标签(例如<br/>)定义,则其内容为空.

打开标签还可以指定属性,例如.<p class="rant">.在此示例中,属性名称为"class",其值为 "rant".

XML语言没有"节点"这样的东西.阅读规范,这个词不会出现.

有些人非正式地使用"节点"这个词来表示元素,这是令人困惑的,因为一些解析器也赋予这个词一个技术含义(识别"文本节点"和"元素节点").确切的含义取决于解析器,因此除非您说明正在使用的解析器,否则该单词的定义不明确.如果你的意思是元素,说'元素'.

Answer 7

节点是元素和属性的基类(基本上也是所有其他XML表示).

Answer 8

元素是唯一一种节点可以有子节点和属性.

Document还有子节点,但
没有属性,没有文本,只有一个子元素.