HTML 4 Introduction n n HTML stands for

HTML 4 - Introduction n n HTML stands for Hyper Text Markup Language. It is the standard format for documents on the World Wide Web. Just as Microsoft Word uses documents with the ". doc" format and Word Perfect uses ". wpd", browsers read documents with the ". htm" or ". html" format. HTML 2. 0 (June 1994), is the baseline standard that all browsers today. A device independent markup language for displaying the organization of information. HTML 3. 0 (1995), tags problem. HTML 4. 9 (April 1998), a number of new formatting elements, changes related to scripts and style sheets, and several modifications to make web pages more accessible to people with disabilities. XHTML – e. Xtensible Hyper Text Markup Language. Official W 3 C Recommendation on January 2000

HTML n n Hyper is the opposite of linear, or simply put "extremely active". Text is what you create HTML with, just like a word processor without all the fancy formatting. Mark up is the process of creating the HTML, you "mark it up" in a word processor. This loosely means, "to write". Language is missleading. It's not a cryptic computer language that you have to learn an entirely new alphabet to understand. It uses plain english. It is a language that your browser understands, and one that you can learn to understand without much effort.

Why XHTML n n n XML is a markup language where everything has to be marked up correctly, which results in "well-formed" documents. XML was designed to describe data and HTML was designed to display data. Today's market consists of different browser technologies, some browsers run internet on computers, and some browsers run internet on mobile phones and helds. 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 pages can be read by all XML enabled devices AND while waiting for the rest of the world to upgrade to XML supported browsers, XHTML gives you the opportunity to write "wellformed" documents now, that work in all browsers and that are backward browser compatible !!!

The Most Important Differences between XHTML and HTML n XHTML elements must be properly nested XHTML documents must be well-formed Tag names must be in lowercase All XHTML elements must be closed n http: //www. w 3 schools. com/default. asp n n n