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HTML and XML

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Presentation Transcript

  1. HTML and XML Behind Web Authoring Tools

  2. Objectives • Introduce HTML • Learn HTML Step by step • Introduce XML

  3. Contents of HTML Document • Text • Displayed by the browser screen • Instructions • Interpreted and executed • Written in HTML elements called tags, which are identified by angle brackets and a keyword (eg, <HEAD> and </HEAD>)

  4. Most Basic HTML Tags

  5. Basic Structure of an HTML Document <HTML> <HEAD> header information goes here </HEAD> <BODY> body of the document goes here </BODY> </HTML>

  6. Learn HTML Step by Step • Headings, horizontal lines, and graphics • Using hyperlinks to point to other web sites • Using a graphic as a hyperlink continued…

  7. Lesson 1: Headings, Horizontal Lines, and Graphics • Heading tags <H#> • Horizontal lines <HR> • Graphics • GIF (graphics interchange format) • JPEG (Joint Photographic Experts Group) • PNG (Portable Network Graphic)

  8. Lesson 1: Headings, Horizontal Lines, and Graphics

  9. Lesson 1: Headings, Horizontal Lines, and Graphics

  10. Lesson 2: Using Hyperlinks to Point to Other Web Sites • Hyperlinks are created using the HTML anchor tags <A> • The link is created with the <A HREF> anchor tag and the link target is created with the <A NAME> anchor tag

  11. Lesson 2: Using Hyperlinks to Point to Other Web Sites

  12. Lesson 3: Using a Graphic As a Hyperlink

  13. Extensible Markup Language • Why extensible? • HTML tags are fixed, limited (<a href=…) • XML extends HTML by offering user-created tags, i.e., a meta-language that defines other languages • XML for Web: DHTML is the result of XML being processed by browsers

  14. XML: More Than Presentation • RSS (Real Simple Syndication): feeds for reader • XML for Web service: text documents passed over Web applications that serve others • Foundation of SOA (Service Oriented Architecture) • SOA: an extension of Enterprise Application Integration

  15. Exercises • What is HTML? • Why do we use it? • How to build a graphic hyperlink? • Is XML just for Web Presentation?

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