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This example shows how to use type customization to parse and serialize
mixed content. The example achieves this by customizing the type with
the mixed content model to include a DOM document that stores the data
as a raw XML representation. The customized type also provides its own
parsing constructor and serialization operator where the mixed content
is extracted from and inserted back to DOM, respectively. The use of
DOM for mixed content storage is one of the options. You may find other
data structures (e.g., a string) more suitable depending on your situation.
For more information on the C++/Tree mapping customization see the C++/Tree
Mapping Customization Guide.
The example consists of the following files:
XML Schema definition for a simple person record vocabulary. Each
record includes the bio element which represents arbitrary XHTML
fragments as mixed content.
Sample XML instance document.
C++ types that represent the given vocabulary, a set of parsing
functions that convert XML instance documents to a tree-like in-memory
object model, and a set of serialization functions that convert the
object model back to XML. These are generated by XSD from people.xsd
with the --custom-type option in order to customize the bio type.
Header file which defines our own bio class by inheriting from the
generated bio_base. It is included at the end of people.hxx using
the --hxx-epilogue option.
Source file which contains the implementation of our bio class.
Driver for the example. It first calls one of the parsing functions
that constructs the object model from the input file. It then prints
the data to STDERR, including the bio information converted to text.
Finally, the driver serializes the object model back to XML.
To run the example on the sample XML instance document simply execute:
$ ./driver people.xml