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+This example shows how to handle XML vocabularies with multiple
+root elements using the C++/Parser mapping.
+
+The example consists of the following files:
+
+protocol.xsd
+ XML Schema which defines a simple bank account protocol with
+ requests such as withdraw and deposit.
+
+balance.xml
+withdraw.xml
+deposit.xml
+ Sample XML instances for the protocol requests.
+
+protocol.hxx
+ C++ types that describe the protocol requests. These are
+ hand-written.
+
+protocol.map
+ Type map. It maps XML Schema types defined in protocol.xsd
+ to the C++ types defined in protocol.hxx.
+
+protocol-pskel.hxx
+protocol-pskel.cxx
+ Parser skeletons generated by XSD from protocol.xsd and
+ protocol.map.
+
+protocol-pimpl.hxx
+protocol-pimpl.cxx
+ Parser implementations that construct the custom object
+ model from an XML instance using the types from protocol.hxx.
+ These are hand-written implementations of the parser skeletons
+ defined in protocol-pskel.hxx.
+
+driver.cxx
+ Driver for the example. It implements a custom document parser
+ that determines which request is being parsed and uses the
+ corresponding parser implementation. The document parser
+ intentionally does not support the deposit request to show
+ how to handle unknown documents. The driver first constructs
+ a parser instance from all the individual parsers found in
+ protocol-pimpl.hxx. In then invokes this parser instance to
+ parse the input file and produce the in-memory object model.
+ Finally, it prints the contents of the object model to STDERR.
+
+To run the example on the sample XML request documents simply
+execute:
+
+$ ./driver balance.xml
+$ ./driver withdraw.xml
+$ ./driver deposit.xml