This document provides an introduction to XHTML, the evolution of HTML, and the origins of the Internet. It explains that XHTML uses tags to provide structure and layout for web pages. The document also outlines some of the key events and technologies in the development of the Internet and World Wide Web, including the creation of HTML, early web browsers like Netscape Navigator, the establishment of URLs and HTTP, and the move to stricter standards like XHTML 1.0 in 2000.

1. Introduction to XHTML

2. What is XHTML? E x tensible H yper t ext M arkup L anguage 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

3. The Internet Explained

4. Origins of the Internet

5. History of XHTML and the Web Hyperlinks = non-linear URL = Uniform Resource Locator [unique address for web pages] HTTP = HyperText Transfer Protocol Set of rules for communicating web info HTML = HyperText Markup Language Scripting Language for simple creation of web pages WWW = World Wide Web Browser = For reading pages written in HTML First browser was “Netscape Navigator” Can you name any other browsers? 1990 Tim Berners-Lee

6. provides order to the web with so many new technologies being developed www.w3.org

7. HTML Competing Browser Developers started introducing their own tags HTML 4.0.1 HTML CSS Content Deprecated Tags (disapproved of) Style Dec 1999 1990 XHTML 1.0 2000 Stricter Rules Easier to adapt for different purposes Eg mobile devices, page reader, language translation More accurate across different browsers Future proofing