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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 out of the box on most UNIX and GNU/Linux
+systems as part of Sun RPC. On Windows you may need to install a
+third-party library which provides the XDR API.
+The example consists of the following files:
+ XML Schema which describes a library of books.
+ Sample XML instance document.
+ C++ types that represent the given vocabulary as well as data
+ representation stream insertion and extraction operations. These
+ are generated by XSD from library.xsd. Note that the
+ --generate-insertion and --generate-extraction options are used
+ to generate the insertion and extraction operations for XDR
+ 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
+To run the example on the sample XML instance document simply execute:
+$ ./driver library.xml