This example shows how to use the the C++/Tree mapping to parse several
XML documents while reusing the underlying XML parser and caching the
schemas used for validation.

The example consists of the following files:

library.xsd
  XML Schema which describes a library of books.

library.xml
  Sample XML instance document.

library.hxx
library.cxx
  C++ types that represent the given vocabulary and a set of parsing
  functions that convert XML instance documents to a tree-like in-memory
  object model. These are generated by XSD from library.xsd.

driver.cxx
  Driver for the example. It first sets up the Xerces-C++ DOM parser
  and caches the library.xsd schema for validation. It then performs
  ten iterations that parse the input file to a DOM document using
  the DOM parser and call one of the parsing functions that constructs
  the object model from this DOM document. On each iteration the driver
  prints a number of book in the object model to STDERR.

To run the example on the sample XML instance document simply execute:

$ ./driver library.xml
