+ * than it is to define unsafe subsets.
+ * A simple compound parse filter that allows us to apply multiple parse filters to a single parse operation.
+ * A ParseFilter that is based on an internal collection of QName's.
+ * implemented by applications to provide an efficient means of serializing non-FOM objects to Atom/XML.
+     * True if the serialization is repeatable.
+ * applications directly without very good reason.
+     * Registers an ExtensionFactory implementation.
+     * Registers a new Parser, this method doesn't override a parser if already exists.
+     * Registers a new Writer, this method doesn't override a writer if already exists.
+     * Registers a new ExtensionFactory, this method doesn't override an extensionFactory if already exists.
+     * Registers a new StreamWriter, this method doesn't override a streamWriter if already exists.