href="libxml-SAX.html#attribute">attribute</a> is prohibited.</p>
<h3><a name="XML_SCHEMAS_ATTR_USE_REQUIRED" id="XML_SCHEMAS_ATTR_USE_REQUIRED"></a>Macro: XML_SCHEMAS_ATTR_USE_REQUIRED</h3><pre>#define XML_SCHEMAS_ATTR_USE_REQUIRED</pre><p>The <a href="libxml-SAX.html#attribute">attribute</a> is required.</p>
<h3><a name="XML_SCHEMAS_BLOCK_DEFAULT_EXTENSION" id="XML_SCHEMAS_BLOCK_DEFAULT_EXTENSION"></a>Macro: XML_SCHEMAS_BLOCK_DEFAULT_EXTENSION</h3><pre>#define XML_SCHEMAS_BLOCK_DEFAULT_EXTENSION</pre><p