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+This example shows how to handle XML Schema polymorphism features such
+as xsi:type attributes and substitution groups in the C++/Parser mapping.
+The case when xsi:type is used on root elements is covered in the
+polyroot examples.
+
+The example consists of the following files:
+
+supermen.xsd
+  XML Schema which describes the "supermen" instance documents.
+
+supermen.xml
+  Sample XML instance document.
+
+supermen-pskel.hxx
+supermen-pskel.cxx
+  Parser skeletons generated by the XSD compiler from supermen.xsd using
+  the following command line:
+
+  xsd cxx-parser --generate-polymorphic supermen.xsd
+
+  Or if using Expat instead of Xerces-C++ as the underlying XML parser:
+
+  xsd cxx-parser --xml-parser=expat --generate-polymorphic supermen.xsd
+
+  Note the use of the --generate-polymorphic command line option.
+
+supermen-pimpl.hxx
+supermen-pimpl.cxx
+  Parser implementations that print the XML data to STDOUT.
+
+driver.cxx
+  Driver for the example. It first constructs a parser instance from
+  all the individual parsers found in supermen-pimpl.hxx. It then invokes
+  this parser instance to parse the input file.
+
+To compile and link the example manually from the command line we can use
+the following commands (replace 'c++' with your C++ compiler name):
+
+c++ -c supermen-pskel.cxx
+c++ -c supermen-pimpl.cxx
+c++ -c driver.cxx
+c++ -o driver driver.o supermen-pskel.o supermen-pimpl.o -lxerces-c
+
+Or if using Expat as the underlying XML parser:
+
+c++ -o driver driver.o supermen-pskel.o supermen-pimpl.o -lexpat
+
+To run the example on the sample XML instance document execute:
+
+./driver supermen.xml