Some More XHTML Syntax Rules: 更多XHTML语法规则： Attribute names must be in lower case 属性名称必须为小写 Attribute values must be quoted 属性值使用双引号 Attribute minimization is forbidden 属性简写是不允许的 The id attribute replaces the name attribute 用id属性来替代name属性 The XHTML DTD defines mandatory elements XHTML DTD定义强制元素
The id Attribute Replaces The name Attribute id属性替换name属性 HTML 4.01 defines a name attribute for the elements a, applet, frame, iframe, img, and map. In XHTML the name attribute is deprecated. Use id instead. 对于a, applet, frame, iframe, img和map，HTML 4.01中定义了一个name属性，在XHTML中是不赞成这样做的，使用id来代替。
This is wrong: 这是错误的：
This is correct: 这是正确的：
Note: To interoperate with older browsers for a while, you should use both name and id, with identical attribute values, like this: 注意：为了版本比较低的浏览器，你应该同时使用name和id属性，并使它们两个的值相同的，像这样：
IMPORTANT Compatibility Note: 兼容性注意点：
To make your XHTML compatible with today''''s browsers, you should add an extra space before the "/" symbol. 让你的XHTML兼容当前的浏览器你应该在/标记前添加空格
The Lang Attribute Lang Attribute The lang attribute applies to almost every XHTML element. It specifies the language of the content within the element
If you use the lang attribute in an element, you must add the xml:lang attribute, like this:
If you use the lang attribute in an element, you must add the xml:lang attribute, like this: :
Mandatory XHTML Elements All XHTML documents must have a DOCTYPE declaration. The html, head and body elements must be present, and the title must be present inside the head element. All All XHTML documents must have a DOCTYPE statement. The html, head and body elements must appear, and the title must be in the head element
This is a minimum XHTML document template:
This is a minimum XHTML document template
">
Title goes here
Body text goes here Note: The DOCTYPE declaration is not a part of the XHTML document itself. It is not an XHTML element, and it should not have a closing tag. Note: The DOCTYPE declaration is not part of the XHTML document itself. It's also not an XHTML element and it shouldn't have a closing tag.
Note: The xmlns attribute inside the tag is required in XHTML. However, the validator on w3.org does not complain when this attribute is missing in an XHTML document. This is because "xmlns=http:/ /www.w3.org/1999/xhtml" is a fixed value and will be added to the tag even if you do not include it.
Note: XHTML documents require that the xmlns attribute appears in the html tag. However, w3.org's validator will not report an error because this attribute does not appear in your XHTML document. This is because "xmlns=http://www.w3.org/1999/xhtml" is a fixed value, even if it is not included in your document, it will be added automatically.
This is correct: