1. XML and Databases Exercise Session 3 (courtesy of Ghislain Fourny/ETH)

2. Department of Computer Science Good to know: XML Schema types Simple type - predefined or user-defined - element or attribute type Complex type - user-defined - element type only Empty content Simple content Complex content Mixed content 2

3. Department of Computer Science Good to know: XML Schema types Types (can) have QNames: All predefined types User-defined types (here simple) 3 Tags, attributes... XML Schema looks like XML... that's because it is XML!

4. Department of Computer Science Good to know: XML Schema types They can also be anonymous. 4 Anonymous types can be defined under any xs:element or xs:attribute. Non- anonymous types have a global scope and must be defined directly under xs:schema.

5. Department of Computer Science Complex types in XML Schema Complex type, complex content 5

6. Department of Computer Science Complex types in XML Schema Simple content (here anonymous) 6

7. Department of Computer Science Complex types in XML Schema Empty content Simple content restricted to "" Or a complex content without any children Mixed content As in complex content, with an additional attribute mixed set to true in xs:complexType 7

8. Department of Computer Science Exercises 1-3 Passenger Flight Airport Booking 8

9. Department of Computer Science Exercises 1-3 Passenger: name, address, passport number Flight: ID, number of seats, date, origin, dest Airport: name, code, tax value Booking: credit card, flight, passenger 9

10. Department of Computer Science Exercise 1: XML Data Sample data 10

11. Department of Computer Science Exercise 1: XML Data How to prevent this? 11

12. Department of Computer Science Exercise 1: XML Data How to prevent this? With a DTD/Schema! 12

13. Department of Computer Science Exercise 2: XML Schema Modelling 13

14. Department of Computer Science Exercise 2: XML Schema Modelling 14 Passport number name address Passenger

15. Department of Computer Science Exercise 2: XML Schema Modelling 15 code name tax Passport number name address Airport Passenger

16. Department of Computer Science Exercise 2: XML Schema Modelling 16 code name tax flightID seatNo date Passport number name address Airport Flight Passenger

17. Department of Computer Science Exercise 2: XML Schema Modelling 17 code name tax flightID seatNo date Passport number name address Airport Flight Passenger source dest

18. Department of Computer Science Exercise 2: XML Schema Modelling 18 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book

19. Department of Computer Science Exercise 2: XML Schema Modelling 19 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book 1 1 N N N M

20. Department of Computer Science Exercise 2: Whats wrong? 20

21. Department of Computer Science Exercise 2: Inconsistency 21

22. Department of Computer Science Exercise 2: Inconsistency 22

23. Department of Computer Science Exercise 2: Redundancy 23

24. Department of Computer Science Exercise 2: Redundancy 24

25. Department of Computer Science Exercise 2: Extraneous data 25

26. Department of Computer Science Exercise 2: A Schema for Passenger 26 Passport number name address Passenger

27. Department of Computer Science Exercise 2: A Schema for Passenger 27 Passport number name address Passenger

28. Department of Computer Science Exercise 2: A Schema for Flight 28 flightID seatNo date Airport Flight source dest

29. Department of Computer Science Exercise 2: A Schema for Flight 29 flightID seatNo date Airport Flight source dest

30. Department of Computer Science Exercise 2: A Schema for Flight 30 flightID seatNo date Airport Flight source dest

31. Department of Computer Science Exercise 2: A Schema for Flight 31 flightID seatNo date Airport Flight source dest

32. Department of Computer Science Exercise 2: A Schema for Airport 32 code name tax Airport

33. Department of Computer Science Exercise 2: A Schema for Airport 33 code name tax Airport

34. Department of Computer Science Exercise 2: A Schema for Airport 34 code name tax Airport

35. Department of Computer Science Exercise 2: Root Element 35

36. Department of Computer Science Exercise 3: DTD and XML Schema 36

37. Department of Computer Science Exercise 3: Corresponding XML Schema 37

38. Department of Computer Science Exercise 4: Corresponding XML Schema 38

39. Department of Computer Science Exercise 3: Corresponding XML Schema 39

40. Department of Computer Science Exercise 3: Corresponding XML Schema 40

41. Department of Computer Science Exercise 3: Corresponding XML Schema 41

42. Department of Computer Science 42 Hope to see you next week!