To help you gain hands-on experience with XML on TPF, this path provides a sample DTD, a sample XML Schema document, and an XML document based on each. You will also get two sample applications with instructions for using these pieces on TPF. This path takes you step-by-step through a series of tasks:

1. First, you will save a copy of a sample Document Type Definition (DTD) and an XML document to your workstation.
   A DTD defines all the allowable elements and attributes (as well as the structure of those elements and attributes) that are used for writing the XML document.
2. Next, you will save a copy of a sample XML Schema document and an XML document based on that XML Schema to your workstation.
   An XML Schema document also defines all the allowable elements, attributes, and structures, but uses a different syntax than a DTD and generally allows you to be more detailed in the definitions.
3. Next, you will save a copy of two sample TPF applications written in C++ that do the following:
   • Use the DOM API with validation against a DTD or XML Schema
   • Use the DOM API without validation
   • Use the SAX API with validation against a DTD or XML Schema
   • Use the SAX API without validation.
4. Before you can use the sample applications, you will prepare a TPF 4.1 test system to receive file transfers from your workstation and then FTP the DTD, XML Schema, and XML documents to the TPF file system.
5. Finally, you will actually use the applications to interact with the sample XML data on your TPF 4.1 test system.