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The Systems Group at ETH Zurich XML and Databases Exercise Session 3 Ghislain Fourny © Department of Computer Science | ETH Zürich.

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Presentation on theme: "The Systems Group at ETH Zurich XML and Databases Exercise Session 3 Ghislain Fourny © Department of Computer Science | ETH Zürich."— Presentation transcript:

1 The Systems Group at ETH Zurich XML and Databases Exercise Session 3 Ghislain Fourny © Department of Computer Science | ETH Zürich

2 Department of Computer Science Exercise 1: Comparison with RDB 2

3 Department of Computer Science Exercise 1: Primary keys? 3 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book 1 1 N N N M

4 Department of Computer Science Exercise 1: Primary keys 4 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book 1 1 N N N M

5 Department of Computer Science Exercise 1: Primary keys with XML Schema 5

6 Department of Computer Science Exercise 1: M-N relationship? 6 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book 1 1 N N N M

7 Department of Computer Science Exercise 1: M-N relationship 7 code name tax flightID seatNo date credit card Passport number name address Airport Flight Passenger source dest book 1 1 N N N M

8 Department of Computer Science Exercise 1: Reservation with XML Schema 8

9 Department of Computer Science Exercise 1: Reservation with XML Schema 9

10 Department of Computer Science Exercise 2: Foreign-key constraints? 10

11 Department of Computer Science Exercise 2: Foreign-key constraints 11

12 Department of Computer Science Exercise 1: Foreign-key constraints? 12

13 Department of Computer Science Exercise 1: Foreign-key constraints 13

14 Department of Computer Science Exercise 1: Foreign-key constraints with XML Schema 14

15 Department of Computer Science Exercise 1: Which constraints DTD can express 15

16 Department of Computer Science Exercise 1: Which constraints DTD can express  Unique constraints with IDs  But on whole document (in XML Schema, selector allows to define domain of uniqueness)  References with IDREFs  In DTD, IDs and IDREFs must begin with a letter – in XML Schema, any value can be used 16

17 Department of Computer Science 17 Hope to see you next week!

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