Learning XML

6.5. Example: Checkbook

It's time now for a useful example that demonstrates the concepts discussed so far. The checkbook from Example 5.1 is a good test subject, so we'll use it again. Example 6.4 shows another instance of the Checkbook document. This is the same document used in Chapter 5, except that another <payment> has been added at the end, resulting in a negative balance:

Example 6.4. Checkbook Instance

<?xml version="1.0"?> <!DOCTYPE checkbook SYSTEM "checkbook.dtd"> <checkbook> <deposit type="direct-deposit"> <payor>Bob's Bolts</payor> <amount>987.32</amount> <date>21-6-00</date> <description category="income">Paycheck</description> </deposit> <payment type="check" label="980"> <payee>Kimora's Sports Equipment</payee> <amount>132.77</amount> <date>23-6-00</date> <description category="entertainment">kendo equipment</description> </payment> <payment type="atm"> <amount>40.00</amount> <date>24-6-00</date> <description category="cash">pocket money</description> </payment> <payment type="debit"> <payee>Lone Star Cafe</payee> <amount>36.86</amount> <date>26-6-00</date> <description category="food">lunch with Greg</description> </payment> <payment type="check" label="981"> <payee>Wild Oats Market</payee> <amount>47.28</amount> <date>29-6-00</date> <description category="food">groceries</description> </payment> <payment type="debit"> <payee>Barnes and Noble</payee> <amount>58.79</amount> <date>30-6-00</date> <description category="work">O'Reilly Books</description> </payment> ...