Xhtml

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XHTML

?Why XHTML Many pages contain BAD HTML

This is bad HTML

Bad HTML XML is a markup language where everything

has to be marked up correctly, which results in "well-formed" documents

??So  XML was designed to describe data and HTML was designed

to display data  XHTML is a combination of HTML and XML (EXtensible Markup Language)  XHTML consists of all the elements in HTML 4.01 combined with the syntax of XML  Today's market consists of different browser technologies, some browsers run Internet on computers, and some browsers run Internet on mobile phones or other small devices. The last-mentioned do not have the resources or power to interpret a "bad" markup language  Therefore - by combining HTML and XML, and their strengths, we got a markup language that is useful now and in the future - XHTML

XHTML vs. HTML XHTML elements must

be properly nested

HTML
  • Coffee
  • Tea
    • Black tea
    • Green tea
  • Milk


 XHTML
  • Coffee
  • Tea
    • Black tea
    • Green tea
  • Milk


XHTML vs. HTML XHTML Elements Must

Always Be Closed

HTML

XHTML

This is a paragraph

This is another paragraph

This is a paragraph

This is another paragraph



A break:
A horizontal rule:
An image:

XHTML vs. HTML XHTML Elements Must

Be In Lower Case

HTML

This is a paragraph



XHTML

This is a paragraph



XHTML vs. HTML XHTML Documents Must Have One Root Element

... ...

XHTML more syntax rules Attribute names must be in lower case HTML: XHTML:
Attribute values must be quoted HTML:
XHTML:


Attribute minimization is forbidden HTML: XHTML:

XHTML more syntax rules The id attribute replaces the name attribute  HTML:  XHTML: The XHTML DTD defines mandatory 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 Title goes here

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