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<h1>What Is PyXB?<a class="headerlink" href="#what-is-pyxb" title="Permalink to this headline">ΒΆ</a></h1>
<p>PyXB is a pure <a class="reference external" href="http://www.python.org">Python</a> package that generates
Python code for classes that correspond to data structures defined by
<a class="reference external" href="http://www.w3.org/XML/Schema">XMLSchema</a>. In concept it is similar to
<a class="reference external" href="http://en.wikipedia.org/wiki/JAXB">JAXB</a> for Java and <a class="reference external" href="http://www.codesynthesis.com/products/xsd/">CodeSynthesis XSD</a> for C++.</p>
<p>The major goals of PyXB are:</p>
<ul class="simple">
<li>Provide a generated Python interface that is “Pythonic”, meaning similar
to one that would have been hand-written:<ul>
<li>Attributes and elements are Python properties, with name conflicts
resolved in favor of elements</li>
<li>Elements with maxOccurs larger than 1 are stored as Python lists</li>
<li>Bindings for type extensions inherit from the binding for the base type</li>
<li>Enumeration constraints are exposed as class (constant) variables</li>
</ul>
</li>
<li>Support bi-directional conversion (document to Python and back)</li>
<li>Allow easy customization of the generated bindings to provide
functionality along with content</li>
<li>Support all XMLSchema features that are in common use, including:<ul>
<li>complex content models (nested all/choice/sequence)</li>
<li>cross-namespace dependencies</li>
<li>include and import directives</li>
<li>constraints on simple types</li>
</ul>
</li>
<li>Validate the documents against their schema</li>
</ul>
<p>Secondary goals, some of which have been achieved in the current release, are
listed in <a class="reference internal" href="vision.html#pyxb-vision"><span class="std std-ref">PyXB Vision</span></a>.</p>
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