Chapter 23 World Wide Web Documents HTML Introduction

Chapter 23 - World Wide Web Documents (HTML) • Introduction • Display Hardware Varies • A Browser Translates And Displays A Web Document • A Consequence Of The Web Approach – Web pages are written in a computer langauge that gives general guidelines about the desired presentation; a browser translates the specification into commands suitable for specific display hardware when rendering a Web page on a given computer display. As a result, the same Web page can appear slightly different when displayed on two different computers or by two different browsers.

Chapter 23 - World Wide Web Documents (HTML) • • HTML, The Language Used for Web Documents Instructions In A Web Page Control The Output A Web Page Is Divided Into Two Main Sections Indentation Can Make HTML Readable – Although a browser ignores indentation when displaying an HTML document, placing tags on separate lines and indenting items can make it easier for a human to read the document. Readability is especially important when the person who updates a Web page differs from the person who initially created the page.

Chapter 23 - World Wide Web Documents (HTML) • • • The Body Of A Web Page Can Contain Text Indentation Can Make Paragraphs Easier To Find A Web Page Can Link To Another Page HTML Allows Numbered And Unnumbered Lists Images On A Web Page Are Digital HTML Allows A Web Page To Include An Image Text Can Appear Adjacent To An Images Can Link To Another Web Page Some Browsers Can Stretch Or Shrink Images

Chapter 23 - World Wide Web Documents (HTML) • • The Background Can Be Controlled Other Features Of HTML Importance of HTML GUI Tools Help with Web Page Creation – Although HTML is the ultimate underlying language, web authoring tools are available that allow a user to compose a Web page without learning HTML

Chapter 23 - World Wide Web Documents (HTML) • Terms – document body – document head – HTML – Hyper. Text Markup Language – tag – GIF – JPEG