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Unit 2: HTML Introduction
XHTML: eXtensible Hyper Text Markup Language. Traditional HTML does not impost much Notes
structural strictness, sometimes resulting in poorly-displayed pages. The use of XHTML enables
content to be displayed similarly across different browsers.
VoiceXML: Used in Voice interaction between humans and computer, mainly in systems that
enable you to, for example check your credit card balance over the phone.
!
Caution The dialogue management and speech recognition- is defined by voiceXML
LaTeX: A document markup language used mainly bye mathematicians, authors, etc. to typeset
their content. It is suitable for representing mathematical formulas.
Task Make a report on the different types of HTML with their examples.
2.1.2 Creation of HTML
Before HTML, a document author didn’t have to care how the document would appear on
someone’s monitor. It was accepted that appearance was the area which the user will look after.
HTML was evolved in seven versions. One of the requirements for creating usable, nonlinear
information system is to make the system easy for non experts to understand and use.
Level 0 HTML
Level 0 HTML was first implemented in 1990. HTML followed the SGML rules of platform
independent.
At level 0, HTML offered a platform-independent means of marking data for interchange. The
concept was that servers would; store and supply data and clients would retrieve and display it.
HTML0.0 was very close to SGML. The only required element was the TITLE element and many
older pages still remain that start with a title and then go straight into the text.
Level 0 allowed a <BODY> tag and authors could include addresses, anchors, block quotes, line
breaks, headings, horizontal rules, images, lists, paragraphs and preformatted text.
Level 1 HTML
HTML 1.0 was developed in 1992 by Dan Connolly. The idea of an HTML container was added
with a HEAD element separated from the BODY Element. Opening and closing tags were required
for some elements.
Level 1 also introduced forms, which makes it possible for authors to have input fields on Weir
nodes that enable feedback from users and open door to considering interaction through Common
Gateway Interface (CGI) scripting.
Did u know? The potential of forms and CGI scripts is still evolving, even with the addition
of new form capabilities in HTML4.
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