XML on TPF: A Short Tutorial

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XML on TPF: A Short Tutorial — Page 13 of 14

Using the Applications

Now that you have placed the DTD, XML Schema, and both sample XML documents in the TPF file system and compiled, linked, and loaded both applications, you are ready to use the applications. The applications are activated using the ZFILE command.


Before continuing, do the following: On your TPF 4.1 test system, use the ZFILE command to see how the two applications display the sample data on the screen. The applications define the allowable options for the command: ZFILE appname [-v=whenvalue] [-n [-s]] -e=elname xmldoc where: appname is the application that you want to run: domxml or saxxml. -v is optional and specifies that you want the XML document validated against a DTD. whenvalue is the level at which you wants your document validated: always means that the parser should always try to validate the document. never means that the parser should never try to validate the document. auto means that the parser will validate if it detects the specification of a DTD. The default value is `auto`. -n is optional and enables namespace processing. -s is optional and enables Schema processing. If you are processing a Schema, you must also enable namespace processing by specifying -n. -e=elname. specifies that you want to display the contents of element elname. xmldoc is the name of the XML document that you want to parse: pnrd.xml or pnrs.xml. For example, the following list shows sample commands and is linked to an image of how your display will look after that command is completed: Using DOM to process the specified XML file: zfile domxml -v=always -e=PhoneNumber pnrd.xml zfile domxml -n -s -e=LastName pnrs.xml zfile domxml -v=never -e=FormOfPayment pnrd.xml zfile domxml -e=PassengerName pnrd.xml zfile domxml -e=FareAndTicketInfo -n -s pnrs.xml Using SAX to process specified file: zfile saxxml -e=PhoneNumber pnrs.xml zfile saxxml -s -n -e=Passengers pnrs.xml zfile saxxml -v=auto -e=FirstName pnrd.xml zfile saxxml -n -s -e=cityPair pnrs.xml zfile saxxml -v=always -e=flightNumber pnrd.xml Once you have entered the commands, you are ready to continue.

For More Information

See TPF Operations for more information about the ZFILE command.
Seeing other's mistakes can often help in the troubleshooting process. The following links will show you the relationship between an on-screen parser error, what was specified in the XML Schema, and how the XML document was coded:

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