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Explains origins of internet and world wide web while introducing xhtml coding
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Introduction to XHTML
What is XHTML?• Extensible Hypertext Markup Language
• XHTML code:<p>This is a <strong>very</strong> important statement!</p>
• Tags are not displayed but are used to tell the browser “how” to display the text
• In early days HTML was used for displaying only text
Origins of the Internet
History of XHTML and the WebHyperlinks = non-linearURL = Uniform Resource Locator
[unique address for web pages]HTTP = HyperText Transfer Protocol
Set of rules for communicating web info
HTML = HyperText Markup LanguageScripting Language for simple creation of web pages
WWW = World Wide WebBrowser = For reading pages written in
HTMLFirst browser was “Netscape Navigator”Can you name any other browsers?
1990Tim Berners-Lee
provides order to the web with so many new technologies being developed
www.w3.org
HTML Competing Browser Developers started introducing their own tags
HTML 4.0.1HTML
CSS
ContentDeprecated Tags (disapproved of)
Style
Dec 1999
1990
XHTML 1.02000 Stricter Rules
Easier to adapt for different purposesEg mobile devices, page reader, language translation
More accurate across different browsersFuture proofing
