The parser can be used to validate a document. This means -that all the constraints that must hold for a valid document are actually -checked. Validation is the default mode of PXP, i.e. every document is -validated while it is being parsed.
In the examples directory of the distribution you find the -pxpvalidate application. It is invoked in the following way: - -
pxpvalidate [ -wf ] file...- -The files mentioned on the command line are validated, and every warning and -every error messages are printed to stderr.
The -wf switch modifies the behaviour such that a well-formedness parser is -simulated. In this mode, the ELEMENT, ATTLIST, and NOTATION declarations of the -DTD are ignored, and only the ENTITY declarations will take effect. This mode -is intended for documents lacking a DTD. Please note that the parser still -scans the DTD fully and will report all errors in the DTD; such checks are not -required by a well-formedness parser.
The pxpvalidate application is the simplest sensible program -using PXP, you may consider it as "hello world" program.