Write a parser to parse invoices using the invoice structure described in How To 25.1. The parser should parse the XML file into an Invoice object and print out the invoice in the format used in Chapter 12.

Data from how to 25.1

ww M Curst SPO HOW TO 25.1 Designing an XML Document Format This How To walks you through the process of designing an XML document format. You will see in Section 25.4 how to formally describe the format with a document type definition. Right now, we focus on an informal definition of the document content. The "output" of this activity is a sample document. Step 1 Gather the data that you must include in the XML document. Write them on a sheet of paper. If at all possible, work from some real-life examples. For exam- ple, suppose you need to design an XML document for an invoice. A typical invoice has An invoice number A shipping address A billing address A list of items ordered If possible, gather some actual invoices. Decide which features of the actual invoices you need to include in your XML document.