 external ID if available</td></tr><tr><td><span class="term"><i><tt>SystemID</tt></i>:</span></td><td>the entity system ID if available</td></tr><tr><td><span class="term"><i><tt>content</tt></i>:</span></td><td>the entity content</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the entity or NULL in case of error</td></tr></tbody></table></div><h3><a name="xmlCleanupPredefinedEntities" id="xmlCleanupPredefinedEntities"></a>Function: xmlCleanupPredefinedEntities</h3>