1. Invitation to Computer Science 6 th Edition Chapter 10 The Tower of Babel

2. Special-Purpose Languages Designed for one specialized task Examples –SQL –HTML –JavaScript 2

3. SQL SQL: Structured Query Language A database stores data Databases can be queried: The user can pose questions to the database SQL is the language used to frame database queries 3

4. HTML HTML: HyperText Markup Language HTML is the language used to create HTML documents Web page –An HTML document viewed with Web browser software 4

5. HTML (continued) An HTML document –Consists of text displayed on the Web page and tags –Tags are special characters –Formatting –Special effects –References to other HTML documents 5

6. 6 Figure 9.4 HTML Code for a Web Page Figure 10.4 HTML Code for a Web Page

7. Figure 10.5 Body of the Web Page Generated by Figure 9.4 7

8. Figure 10.6 Some HTML Tags 8

9. Online Tutorial http://www.w3schools.com 9