What is the difference between html and xhtml and xml
This time I will bring you what is the difference between html and xhtml and xml, what are the precautions about the difference between html, xhtml and xml, the following is a practical case, let’s take a look one time.
Development Trend:
html (Hypertext Markup Language) - xhtml (Extensible Hypertext Markup Language) - xml (Extensible Markup Language);
html:
1. Insensitive to case;
2. Tags do not have to appear in pairs;
3.
;
xhtml:
1. It is case-sensitive and must be lowercase;
2. Tags must appear in pairs, and if there is a start tag, there must be an end tag;
3 .Attribute value must be within quotation marks;
4. Attribute minimization is not supported:
eg: Correct:
Error:
5. The name attribute is deprecated and will be eliminated in the future;
6. Empty elements must also end with tags: such as: < br/>,
(horizontal dividing line)
xml:
html will eventually develop into xml. xhtml is a transition between html and xml. The characteristics of xhtml Also suitable for xml;
I believe you have mastered the method after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!
Related reading:
How to operate the child page of iframe to shield the page pop-up layer effect of the parent page
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The above is the detailed content of What is the difference between html and xhtml and xml. For more information, please follow other related articles on the PHP Chinese website!
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