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+This example shows how to save/load the object model to/from XDR
+(eXternal Data Representation) binary format using XDR streams.
+The XDR API is available on most UNIX and GNU/Linux systems as part
+of Sun RPC (libtirpc-dev package on Debian/Ubuntu, libtirpc-devel
+package on Fedora/RHEL, and as a part of the Standard C Library on
+FreeBSD and MacOS). On Windows you may need to install a third-party
+library which provides the XDR API.
+
+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 as well as data
+  representation stream insertion and extraction operations.
+
+  These files are generated by the XSD compiler from library.xsd using
+  the following command line:
+
+  xsd cxx-tree --generate-ostream --generate-comparison \
+      --generate-insertion 'XDR' --generate-extraction 'XDR' library.xsd
+
+  Note that the --generate-insertion and --generate-extraction options
+  are used to generate the insertion and extraction operations for XDR
+  stream.
+
+driver.cxx
+  Driver for the example. It first calls one of the parsing functions
+  that constructs the object model from the input XML file. It then
+  saves the object model to the XDR representation and loads it back.
+  Additionally, it prints the content of the object model before saving
+  it to the XDR representation and after loading it from the XDR
+  representation.
+
+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 library.cxx
+c++ -c driver.cxx
+c++ -o driver driver.o library.o -ltirpc -lxerces-c
+
+To run the example on the sample XML instance document execute:
+
+./driver library.xml